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Effect of space allowance and mixing on growth performance and body lesions of grower-finisher pigs in pens with a single wet-dry feeder

Porcine Health Management volume 7, Article number: 7 (2021) Cite this article

Abstract

Background

Low space allowance (SA) and mixing may result in reduced growth performance (GP) and animal welfare issues because of adverse social behaviours directed to pen mates. This could be exacerbated in pens with single space feeders owing to social facilitation of feeding behaviour. The present study aimed to investigate the effect of SA and mixing on GP and body lesions (BL) in pens with one single space wet-dry feeder.

Results

Two experiments were conducted on grower-finisher pigs from 10 to 21 weeks of age. In Exp1, pigs (N = 216) were assigned to three SA; 0.96 m2/pig (n = 6 pens; 10 pigs/pen; SA96), 0.84 m2/pig (n = 6; 12 pigs/pen; SA84) and 0.72 m2/pig (n = 6; 14 pigs/pen; SA72), in a randomized design. In Exp2, pigs (N = 230) were used in a 2 × 2 factorial randomized design considering SA and mixing as treatments. Pigs were assigned to two SA; 0.96 m2/pig (n = 10 pens; 10 pigs/pen; SA96) and 0.78 m2/pig (n = 10; 13 pigs/pen; SA78) and were either mixed or not at the entry to the finishing facility. GP was not affected by SA (P > 0.05) in either experiment. In Exp2, non-mixed pigs were 5.4 kg heavier (P <  0.001), gained 74 g more per day (P = 0.004), consumed 101.8 g more of feed per day (P = 0.007) and tended to have higher feed efficiency (P = 0.079) than mixed pigs from 11 to 21 weeks of age. Number of BL was affected by SA in both experiments. In Exp1, SA72 pigs had 74.4 and 97.4% more BL than SA96 and SA84 pigs at 20 weeks of age respectively (P <  0.01). In Exp2, SA78 pigs had 48.6, 43.6 and 101.3% more BL than SA96 pigs at 12, 16 and 21 weeks of age respectively (P <  0.05). Mixing did not affect the number of BL from 12 to 21 weeks of age in Exp2 (P > 0.05).

Conclusion

Mixing had a considerable effect on growth performance thus, strategies to avoid or mitigate mixing should be considered. Although space allowance had no effect on growth performance, high number of body lesions in the lower space allowance indicates that space allowances equal or below 0.78 m2/pig are detrimental to the welfare of pigs despite following the EU legislation.

Background

One of the greatest challenges for pig producers is to maximise pig production efficiency and minimise housing cost, without compromising animal welfare and farm sustainability. Housing costs are the second highest cost during the grower-finisher period after feed cost [1]. A higher number of pigs per pen, reduces the housing cost per pig as pens are used more efficiently [2]. However, for a given pen size, increasing the number of pigs per pen causes a reduction in the space allowance (SA), and either a reduction in feeder space per animal in long trough systems or an increase in the ratio of animals per feeder in facilities with an ad libitum feeding arrangement [3]. This may result in a reduction in productive performance [4,5,6]. Changing the number of pigs per pen may induce confounding on whether productive performance is affected by SA, feeder space or group size [7], although this method is the most common applied in commercial conditions. Nevertheless, recent research pointed out no effect of group size and feeder space on productive performance [1, 8, 9].

Kyriazakis and Whittemore [10] reported a formula where SA in m2 is expressed as: SA = k × BW0.667 where k represents a space allowance coefficient and BW0.667 represents the geometric conversion of body weight (BW) in kg to area. Gonyou et al. [11] reported that below 0.0336 m2/BW0.667 productive performance is affected. However, these thresholds are likely to change for each type of building, floor type, feeders, environmental enrichment, sex and pig’s genetics [9, 12], and animal welfare may be compromised before performance is affected. Space allowance is part of the Welfare Quality assessment of pig production [13] and it is well known that insufficient SA can lead to adverse social behaviours directed to pen mates, resulting in skin lesions, lameness, and tail biting [14]. These lesions are more sensitive indicators of pig welfare [15] than growth performance. Existing research recognises the critical role played by space allowance [7, 14, 16] and mixing [17] on the number of body lesions per pig as an indicator of poor animal welfare. The physical damage induced by aggression may end affecting pig performance causing carcass condemnations and economic losses for pig producers [18]. Moreover, damaging behaviour may contribute to chronic stress which affects both mental and physiologic natural state of the animals [19], thereby having detrimental implications to the efficiency and sustainability of swine production systems [20].

Mixing is a common strategy used in pig production to sort pigs by weight to reduce variability and facilitate management in the grower-finisher stage, even though it has minimal impact on the final variability in individual pig weights within a pen [7, 21]. In fact, there are indications that mixing affects productive performance by reducing average daily gain (ADG) and average daily feed intake (ADFI) [22, 23] and it also affects animal welfare as pigs show severe aggression after re-grouping in order to establish a new social hierarchy [17]. Mixing is unavoidable in facilities with large groups at the finisher stage [8, 24], or it may also depend on the previous management undertake during the farrowing and nursery period [25]. However, farrow-to-finish commercial farms with pens of 10 to 14 pigs per pen at the finishing stage, could facilitate the maintenance of intact litters from farrowing to slaughter with no mixing. Despite no references are available, such a penning arrangement with one single space wet-dry feeder is a common type of accommodation for grower-finisher pigs in Europe. Thus, studies optimizing this system for efficiency and animal health and welfare are needed.

Previous literature showed the effects of SA on growth performance in grower-finisher pigs [1, 4, 11] but the information on how mixing affects growth performance in grower-finisher pigs is scarce and little attention has been paid to whether space allowance and mixing interact with each other [22, 23]. Understanding how productive performance is affected by different space allowances and mixing in each system is important for pig producers, veterinarians and advisors to make better management decisions. In the present study we hypothesised that an interaction between mixing and SA exists and it affects pig productive performance and animal welfare. Therefore, the aim of the present study was to investigate the effect of space allowance and mixing on growth performance and body lesions, as a proxy for aggression, in pens with a single space wet-dry feeder during the grower-finisher stage.

Methods

Care and use of animals

Two experiments (Exp1 and Exp2) were conducted at the Teagasc Pig Research Facility in Fermoy, Co. Cork, Ireland. Both experiments received ethical approval from the Teagasc Animal Ethics Committee (TAEC 204/2018). Danish Duroc × (Large White × Landrace) grower-finisher pigs were housed in mixed sex pens with fully slatted concrete floor (2.4 × 4.2 m) containing a single wet-dry feeder (330 mm [Width] × 370 mm [Depth] × 1000 mm [Height]; MA37, Verba, Netherlands) and one supplementary nipple drinker. Water and pelleted feed were provided ad libitum. Temperature was controlled by a mechanical ventilation system with fan speed and air inlet area regulated by a climate controller. Pens were enriched with a larch wood post. Pigs were fed a single soybean meal-maize-wheat based finisher diet (16.2% Crude Protein, 9.7 MJ per Net Energy and 0.92% Standard Ileal Digestible Lysine per kg of feed) and remained in the facility until the first group of pigs reached 110 kg of BW and were sent to slaughter in both experiments.

In Exp1, a total of 216 pigs were used and moved as intact litter pens to the finisher accommodation at 10 weeks of age (26.3 ± 2.26 kg BW). Pigs were assigned per pen to three different SA; 0.96 m2/pig (10 pigs/pen; n = 6; SA96), 0.84 m2/pig (12 pigs/pen; n = 6; SA84) and 0.72 m2/pig (14 pigs/pen; n = 6; SA72), in a randomized design. Litter pens were adjusted to the SA treatments by removing pigs in case it was necessary. All SA were above the minimum space per pig set by European legislation based on live weight [26].

In Exp2, a total of 230 pigs were used in a 2 × 2 factorial randomized design considering SA and mixing as treatments. Pigs were moved to the finisher accommodation at 11 weeks of age (34.3 ± 3.25 kg BW). Pigs were assigned to two different SA; 0.96 m2/pig (n = 10 pens; 10 pigs/pen; SA96) and 0.78 m2/pig (n = 10 pens; 13 pigs/pen; SA78), all above the minimum space per pig set by European legislation based on live weight [26]. Mixing was applied randomly to 5 pens of each SA while the rest of the pens remained as litter pens. Litter pens were adjusted to the SA treatments by removing pigs in case it was necessary.

In both experiments, space allowances were adjusted by changing the number of pigs per pen as it would happen in field conditions. Space allowance coefficient (k) for each treatment were calculated using the formula SA = k × BW0.667 [10] and are reported in Table 1.

Table 1 Initial and final space allowance coefficient (k) for each treatment in experiment 1 and 2
Full size table

Measurements

Body weight, feed intake and feed efficiency traits

In both experiments, pigs were weighed per pen and BW was recorded every two weeks until the first group of pigs reached 110 kg of BW and were sent to slaughter. Average daily gain was calculated for every 2 weeks interval. Feed intake was recorded daily at a pen level, added for every 2 week period and ADFI was calculated. Feed conversion ratio (FCR) was calculated as \( \frac{\mathrm{kg}\ \mathrm{of}\ \mathrm{feed}\ \mathrm{consumed}}{\mathrm{BW}\ \mathrm{gain}} \) for each 2-week period.

Pen efficiency

Overall pen efficiency was calculated for each treatment in both Exp1 and Exp2. Pen efficiency was calculated as \( \frac{\mathrm{kg}\ \mathrm{daily}\ \mathrm{gain}}{\mathrm{sq}\ \mathrm{m}\ \mathrm{space}} \).

Body lesion counts

Following the Welfare Quality® criteria [13], the body of the pigs was divided into anterior, mid and posterior part. Body lesion was defined as either surface penetration of the epidermis or penetration of the muscle tissue [13]. Then, all skin lesions in each location were counted individually as body lesions and recorded on a check sheet [13]. In Exp1, body lesions were counted at 20 weeks of age before pigs started to go to slaughter. In Exp2, body lesions were counted at 12, 16 and 21 weeks of age.

Statistical analyses

All data were analysed using SAS v9.4 (SAS Institute Inc., Cary, NC, USA). Each pen was considered as the experimental unit for all data analyses. In Exp1, the models included SA as fixed effects. In Exp2, models included SA, mixing and their interaction as fixed effects. Models for BW, ADG, ADFI, FCR and pen efficiency were analysed using general linear mixed model accounting for repeated measurements in both experiments. Initial BW was used as a covariable for BW, ADG, ADFI and FCR. Body lesions were analysed using a generalized linear mixed model in both experiments. Difference between treatment groups on body lesions were calculated as \( \frac{\mathrm{Group}\ \mathrm{A}-\mathrm{Group}\ \mathrm{B}}{\mathrm{Group}\ \mathrm{B}} \). Multiple means comparisons were done using Tukey-Kramer’s correction in all cases. Alpha level for determination of significance was 0.05 and trends were identified as alpha of 0.10. Results for fixed effects are reported as least square means ± standard error mean.

Results

Body weight, feed intake and feed efficiency traits

Final BW, ADG, ADFI and FCR from 10 to 20 weeks of age, were not affected by SA in Exp1 (P > 0.05; Table 2); although SA96 pigs were numerically heavier and had lower FCR than SA84 and SA72 pigs by the end of the trial.

Table 2 Effect of space allowance on productive performance and body lesion counts in Exp11
Full size table

BW showed an interaction between SA and mixing in Exp2. SA78 non-mixed pigs were 6.1 and 6.5 kg heavier than SA96 and SA78 mixed pigs at 21 weeks of age (P <  0.001; Table 3). This interaction was not present for ADG, ADFI or FCR. Non-mixed pigs gained 74 g more per day (P = 0.004) and consumed 101.8 g more of feed per day (P = 0.007) than mixed pigs from 11 up to 21 weeks of age (Table 3). Non-mixed pigs tended to have lower FCR compared to mixed pigs from 11 to 21 weeks of age (P = 0.079; Table 3).

Table 3 Effect of space allowance × mixing on productive performance and body lesion counts in Exp21
Full size table

Pen efficiency

Pen efficiency increased by reducing SA during the grower-finisher period in both experiments (P < 0.001). SA72 pigs had higher overall pen efficiency compared to SA96 and SA84 pigs in Exp1 (P < 0.001; Fig. 1). Moreover, in Exp2, SA78 non-mixed pigs had higher overall pen efficiency than SA78 mixed pigs (P = 0.049) and SA96 non-mixed and mixed pigs (P < 0.001; Fig. 2). Also, SA78 mixed pigs had higher overall pen efficiency than SA96 non-mixed and mixed pigs (P < 0.05; Fig. 2).

Fig. 1
figure 1

Pen efficiency of the space allowance treatments from 10 to 20 weeks of age in Exp1. a, b Significant differences between treatments (P < 0.05)

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Fig. 2
figure 2

Pen efficiency of the space allowance × mixing treatments from 11 to 21 weeks of age in Exp2. a, b Significant differences between treatments (P < 0.05)

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Body lesion counts

Body lesion counts were higher at the lower SA at 20 weeks of age in Exp1 (Table 2). SA72 pigs had 78.3 and 105.0% more lesions than SA84 and SA96 pigs on the anterior body region respectively (P < 0.001). There was no difference in counts on the mid body region between SA (P > 0.05). On the posterior body region, SA72 pigs had 112.5% more lesions than SA96 pigs (P = 0.021), although no differences were observed between SA84 pigs and the other groups (P > 0.05). In total, SA72 pigs had 74.4 and 97.4% more lesions than SA84 and SA96 pigs respectively (P < 0.01). In Exp2 (Table 3), body lesion counts were higher at lower SA, however no mixing and interaction effect were observed (P > 0.05). SA78 pigs had 72% more lesions on the anterior body region (P < 0.001) and 48.6% more lesions in total (P = 0.004) than SA96 pigs at 12 weeks of age. There was no difference in the mid and posterior body region between SA treatments at 12 weeks of age (P > 0.05). At 16 weeks of age, SA78 pigs had 45.3, 45.8, 39.0 and 43.6% more lesions than SA96 pigs on the anterior, mid, posterior and total body region respectively (P < 0.05). SA78 pigs had 78.3, 127.8 and 137.5% more lesions than SA96 pigs on the anterior, mid and posterior body region respectively at 21 weeks of age (P < 0.01). In total, SA78 pigs had 101.3% more lesions than SA96 pigs at the end of the trial (P < 0.001). Body lesion counts decreased from 16 to 21 weeks of age in all treatments (P < 0.05).

Discussion

Small group pens with 10–14 grower-finisher pigs are convenient from a management point of view because they allow for a rapid monitoring of health and welfare issues in pigs, without the need to access the pen. This pen system is normally linked to wet-dry feeders as these optimize feed efficiency [27]. Despite no references are available, the authors’ experience in groups like EUPIG (https://www.eupig.eu/) or the ECPHM suggests that this is one of the most common systems in growing-finishing units in the EU. To understand how space allowance and mixing influence growth performance and welfare of pigs in this system, pigs were subjected to three space allowances (0.96, 0.84 and 0.72 m2/pig) in a first trial, and two space allowances (0.96 and 0.78 m2/pig) combined with mixing in the second trial. These space allowances were chosen above the 0.65 m2/pig minimum set by European legislation based on live weight [26] which is already criticised from a welfare point of view because of very low amount of shared space [28]. The space allowances were adjusted by changing the number of pigs per pen as it would be observed in current field situations. This fact could induce confounding on whether growth performance is affected by space allowance, feeder space or group size [7]. However, these factors are usually confused in any commercial conditions. Nevertheless, Schmolke et al. [8] observed no detrimental effect on growth performance of pigs housed at 10, 20, 40 and 80 pigs per pen with a space allowance of 0.76 m2/pig and one single wet-dry feeder provided for every 10 pigs. Moreover, Flohr et al. [1] also reported no effect of group size on ADG, ADFI and FCR in similar conditions to the present study. This results suggests that group size would not affect productive performance in the present study. Restricted feeder space could also impact growth performance [3]. Wastell et al. [9] compared group sizes of 20 and 26 pigs per pen and did not find any detrimental effect on growth performance with 10 pigs per wet-dry feeder space compared to 13 pigs per wet-dry feeder space considering a space allowance of 0.65 or 0.78 m2/pig. This results suggest that feeder space would not affect growth performance in the present study. Hence, the present study discusses space allowance as the main factor to affect growth performance regarding the pen system studied.

In terms of space allowance, previous studies observed that decreasing space allowance resulted in a poorer growth performance in pigs with space allowances of 0.65 m2/pig and similar slaughter weights [4, 5, 9] or 0.80 m2/pig when marketed to slaughter weights up to 138 kg of BW [29]. Overall, all these studies can be compared using the allometric approach expressing space allowance as a coefficient (k) [10]. Gonyou et al. [11] stated that the critical k value below which growth performance is affected as space allowance is further decreased, ranges from 0.0317 to 0.0348 over all data sets analysed using a broken-line analysis. In our study, pigs with 0.72 and 0.78 m2/pig reached the critical k value by the end of the trial when the first group of pigs reached the marketed weight (i.e. 110 kg of BW) and were sent to slaughter. Thus, the growth performance of the pigs would not be compromised during the grower-finisher period if space allowance is established based on the critical k value at the marketed weight.

Mixing affected growth performance during the whole grower-finisher period in Exp2. The drop in ADG and ADFI is consistent with previous literature which observed that mixed pigs had decreased ADG and ADFI when they were followed in a 4 week experiment at the beginning of the grower-finisher period [22, 23]. Stookey and Gonyou [30] also observed a depressed ADG in mixed pigs after being mixed for a 2 week period when they had 83 kg of BW. The present study showed that mixing causes a severe effect on growth performance in currently modern facilities and genetics, and strategies to avoid mixing or mitigate it are an important issue for future research [31, 32].

The underlying hypothesis in this study was that space allowance and mixing interact with each other in current field situations. The study found that mixing effect on final BW is exacerbated at lower space allowances (i.e. 0.78 m2/pig). However, this interaction did not show up in any of the other variables and should be checked for repeatability in further experiments. Hyun et al. [22] reported that when pigs are subjected to multiple concurrent environmental stressors such as high ambient temperature, regrouping and low space allowance, the final effect over productive performance is additive.

In terms of animal welfare, the current study found that the number of body lesions increased at lower space allowances. This finding is in accordance with previous literature which reported a strong relationship between space allowance and body lesions [7, 14, 16]. Anil et al. [7] stated that animal welfare is enhanced at higher space allowances in terms of postural behaviour, lower injuries and aggression. Space allowance affected the number of body lesions during the whole grower-finisher period. Nevertheless, the number of body lesions decreases as the pigs get heavier which is in accordance with previous studies [33]. A possible explanation for this might be related to the pigs’ experience and ability to adapt to their social environment and being in a stable group for a long time which benefits the long term welfare of the pigs [34, 35]. The present study raises the possibility that there is a threshold between 0.78 and 0.84 m2/pig which an increase in the number of body lesions due to space allowance is observed. Still, the number of body lesions as a proxy for aggression may vary because of other factors not controlled in the present study, and moreover, it could also be related to the pen design and the wet-dry feeder space per pig.

One interesting finding was that highest body lesion counts were seen in the anterior body region which is consistent with fighting for access to the feeder [36]. Single space wet-dry feeders may allow to accommodate a high number of pigs per feeder space without having a detrimental effect on growth performance [9, 37]. However, López-Vergé et al. [38] observed that pigs allotted to more feeder spaces had low body lesion counts and tended to have low BW variability within pen by the end of the grower-finisher period.

The results provided in the present study indicate that animal welfare may be compromised before growth performance is affected. Averós et al. [39] suggested a critical k value of 0.039 for lying behaviour with a broken-line analysis. This k value is higher than the 0.0336 reported by Gonyou et al. [11] below which productive performance is affected. High number of body lesions caused by competition or aggression, are likely associated with detrimental implications for pig health and performance due to immunosuppression caused by the social stress [40,41,42]. This fact may be exacerbated in farms that have more infectious diseases in comparison to the farm where the trial was performed, which is free of the main infectious diseases. Ultimately, compromised animal welfare has detrimental implications to the sustainability of the swine production system [20].

Mixing pigs leads to agonistic social behaviour mainly within the first 24 h [43]. However, the current study observed that the number of body lesions due to aggression in mixed groups is the same as the non-mixed groups after 1 week of being mixed. This finding is consistent with previous studies which may be explained by the establishment of the social hierarchy [44,45,46]. Nevertheless, mixed pigs showed a poor growth performance compared to their counterparts in the study. This could be related to the social network properties and chronic stress that are not shown in body lesions [19, 46, 47].

Regarding pen efficiency, this study supports evidence from previous observations [7] which showed that pigs in lower space allowances had higher overall pen efficiency. In addition, pen efficiency showed an interaction between space allowance and mixing which indicates that pen efficiency in lower space allowance may be affected when pigs are mixed. These results may encourage pig producers to seek optimal space allowances to optimize overall efficiency and reduce housing costs. Nevertheless, the present study also observed that pig welfare is aggravated in low space allowances. This and if other environmental stressors such as high ambient temperature, mixing or the farm sanitary status are considered, pig performance and pig producer’s income may be mitigated even with improved pen efficiency. Therefore, further studies considering economic analyses on how environmental stressors affect pig performance and welfare in different space allowances are needed.

Conclusions

This study provides a deeper insight into how space allowance and mixing affect growth performance and animal welfare in pens of 10–14 grower-finisher pigs with one single wet-dry feeder. Mixing appears to have a considerable effect on growth performance although the number of body lesions is not affected once social hierarchy is established. Strategies to avoid or mitigate it are recommended in current field situations with a similar pen design. Space allowance will not compromise growth performance if it is established based on the critical k value at the marketed weight. Nevertheless, the increase on the number of body lesions in lower space allowances indicates that 0.72 and 0.78 m2/pig are detrimental to the welfare of pigs in single wet-dry feeder pens despite being compliant with the EU legislation. Animal welfare is affected before productive performance. Then, farmers should take it into account to maximise growth performance and overall efficiency of the facility without sacrifice animal welfare as a market concept.

Availability of data and materials

The datasets used and analysed during the current study are available from the corresponding author on reasonable request.

Abbreviations

ADG:

Average daily gain

ADFI:

Average daily feed intake

BW:

Body weight

Exp1:

Experiment 1

Exp2:

Experiment 2

FCR:

Feed conversion ratio

SA:

Space allowance

SA96:

0.96 m2/pig

SA84:

0.84 m2/pig

SA78:

0.78 m2/pig

SA72:

0.72 m2/pig

References

  1. Flohr JR, Dritz SS, Tokach MD, Woodworth JC, Derouchey JM, Goodband RD. Development of equations to predict the influence of floor space on average daily gain, average daily feed intake and gain : feed ratio of finishing pigs. Animal. 2017;12(5):1022–9.

    Article  PubMed  CAS  Google Scholar 

  2. Powell TA, Brumm MC, Massey RE. Economics of space allocation for grower-finisher hogs: a simulation approach. Rev Agric Econ. 1993;15(1):133–41.

    Article  Google Scholar 

  3. DeDecker JM, Ellis M, Wolter BF, Corrigan BP, Curtis SE, Hollis GR. Effect of stocking rate on pig performance in a wean-to-finish production system. Can J Anim Sci. 2005;85(1):1–5.

    Article  Google Scholar 

  4. Thomas LL, Goodband RD, Woodworth JC, Tokach MD, Derouchey JM. Effects of space allocation on finishing pig growth performance and carcass characteristics. Transl Anim Sci. 2017;1(3):351–7.

  5. Kim KH, Kim KS, Kim JE, Kim DW, Seol KH, Lee SH, et al. The effect of optimal space allowance on growth performance and physiological responses of pigs at different stages of growth. Animal. 2017;11(3):478–85.

    Article  CAS  PubMed  Google Scholar 

  6. Carpenter CB, Holder CJ, Wu F, Woodworth JC, Derouchey JM, Tokach MD, et al. Effects of increasing space allowance by removing a pig or gate adjustment on finishing pig growth performance. J Anim Sci. 2017;96(7):2659–64.

  7. Anil L, Anil SS, Deen J. Effects of allometric space allowance and weight group composition on grower-finisher pigs. Can J Anim Sci. 2007;87(2):139–51.

    Article  Google Scholar 

  8. Schmolke SA, Li YZ, Gonyou HW. Effect of group size on performance of growing-finishing pigs. J Anim Sci. 2003;81(4):874–8.

    Article  CAS  PubMed  Google Scholar 

  9. Wastell ME, Garbossa CAP, Schinckel AP. Effects of wet/dry feeder and pen stocking density on grow-finish pig performance. Transl Anim Sci. 2018;2(4):358–64.

    Article  PubMed  PubMed Central  Google Scholar 

  10. Kyriazakis I, Whittemore C. Whittemore’s science and practice of pig production. 3rd ed. Oxford: Blackwell Publishing Ltd; 2006.

    Book  Google Scholar 

  11. Gonyou HW, Brumm MC, Bush E, Deen J, Edwards SA, Fangman T, et al. Application of broken-line analysis to assess floor space requirements of nursery and grower-finisher pigs expressed on an allometric basis. J Anim Sci. 2006;84(1):229–35.

    Article  CAS  PubMed  Google Scholar 

  12. Deen J. Effect of stocking density on the welfare and performance of grow-finish pigs. In: Research report: animal welfare. Des Moines: NPB (National Pork Board). 2005. https://www.pork.org/wp-content/uploads/2006/12/04-093-DEEN-UofMN.pdf. Accessed 15 May 2020. .

  13. Welfare Quality®. Welfare Quality ® assessment protocol for pigs (sows and piglets, growing and finishing pigs). Lelystad: Welf Qual Consortium; 2009. p. 1–123.

    Google Scholar 

  14. Vermeer HM, Dirx-Kuijken NCPMM, Bracke MBM. Exploration feeding and higher space allocation improve welfare of growing-finishing pigs. Animals. 2017;7(5):3–11.

    Article  Google Scholar 

  15. Mkwanazi MV, Kanengoni AT, Chimonyo M. Interaction effects of pen environment and sex on behavior , skin lesions and physiology of Windsnyer pigs. Asian-Australas J Anim Sci. 2019;32(3):452–8.

    Article  PubMed  PubMed Central  Google Scholar 

  16. Fu L, Li H, Liang T, Zhou B, Chu Q, Schinckel AP, et al. Stocking density affects welfare indicators of growing pigs of different group sizes after regrouping. Appl Anim Behav Sci. 2016;174:42–50.

    Article  Google Scholar 

  17. Tong X, Shen C, Chen R, Gao S, Liu X, Schinckel AP, et al. Reestablishment of social hierarchies in weaned pigs after mixing. Animals. 2020;10(1):1–12.

    Google Scholar 

  18. Dalmau A, Nande A, Vieira-Pinto M, Zamprogna S, Di Martino G, Ribas JCR, et al. Application of the welfare quality® protocol in pig slaughterhouses of five countries. Livest Sci. 2016;193(May):78–87.

    Article  Google Scholar 

  19. Sutherland MA, Niekamp SR, Rodriguez-Zas SL, Salak-Johnson JL. Impacts of chronic stress and social status on various physiological and performance measures in pigs of different breeds. J Anim Sci. 2006;84(3):588–96.

    Article  CAS  PubMed  Google Scholar 

  20. Broom DM. Animal welfare: an aspect of care, sustainability, and food quality required by the public. J Vet Med Educ. 2010;37(1):83–8.

    Article  PubMed  Google Scholar 

  21. O’Quinn PR, Dritz SS, Goodband RD, Tokach MD, Swanson JC, Nelssen JL, et al. Sorting growing-finishing pigs by weight fails to improve growth performance or weight variation. J Swine Health Prod. 2001;9(1):11–6.

    Google Scholar 

  22. Hyun Y, Ellis M, Riskowski G, Johnson RW. Growth performance of pigs subjected to multiple concurrent environmental stressors. J Anim Sci. 1998;76(3):721–7.

    Article  CAS  PubMed  Google Scholar 

  23. Hyun Y, Ellis M, Johnson RW. Effects of feeder type, space allowance, and mixing on the growth performance and feed intake pattern of growing pigs. J Anim Sci. 1998;76(11):2771–8.

    Article  CAS  PubMed  Google Scholar 

  24. Street BR, Gonyou HW. Effects of housing finishing pigs in two group sizes and at two floor space allocations on production, health, behavior, and physiological variables. J Anim Sci. 2008;86(4):982–91.

    Article  CAS  PubMed  Google Scholar 

  25. Calderón Díaz JA, Diana A, Boyle LA, Leonard FC, McElroy M, McGettrick S, et al. Delaying pigs from the normal production flow is associated with health problems and poorer performance. Porc Health Manag. 2017;3:1–6.

    Article  Google Scholar 

  26. Council of the European Union. 2008/120/ EC - Laying down minimum standards for the protection of pigs. Off J Eur Union. 2008;47:5–13.

  27. O’Meara FM, Gardiner GE, O’Doherty JV, Lawlor PG. The effect of feed form and delivery method on feed microbiology and growth performance in grow-finisher pigs. J Anim Sci. 2020;98(3):1–11.

    Article  Google Scholar 

  28. Averós X, Aparicio MA, Ferrari P, Guy JH, Hubbard C, Schmid O, et al. The effect of steps to promote higher levels of farm animal welfare across the EU. Societal versus animal scientists’ perceptions of animal welfare. Animals. 2013;3(3):786–807.

    Article  PubMed  PubMed Central  Google Scholar 

  29. Johnston LJ, Rozeboom DW, Goodband RD, Moeller SJ, Shannon MC, Schieck SJ. Effect of floor space allowances on growth performance of finishing pigs marketed at 138 kilograms. J Anim Sci. 2017;95(11):4917–25.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  30. Stookey JM, Gonyou HW. The effects of regrouping on behavioral and production parameters in finishing swine. J Anim Sci. 1994;72(11):2804–11.

    Article  CAS  PubMed  Google Scholar 

  31. Peden RSE, Turner SP, Boyle LA, Camerlink I. The translation of animal welfare research into practice: the case of mixing aggression between pigs. Appl Anim Behav Sci. 2018;204:1–9.

    Article  Google Scholar 

  32. Peden RSE, Akaichi F, Camerlink I, Boyle LA, Turner SP. Factors influencing farmer willingness to reduce aggression between pigs. Animals. 2019;9(1):6.

  33. Meyer-Hamme SEK, Lambertz C, Gauly M. Does group size have an impact on welfare indicators in fattening pigs? Animal. 2016;10(1):142–9.

    Article  CAS  PubMed  Google Scholar 

  34. Godyń D, Nowicki J, Herbut P. Effects of environmental enrichment on pig welfare—a review. Animals. 2019;9(383):1–17.

    Google Scholar 

  35. Tennessen T. Coping with confinement - features of the environment that influence animals’ ability to adapt. Appl Anim Behav Sci. 1989;22(2):139–49.

    Article  Google Scholar 

  36. Botermans JAM, Svendsen J. Effect of feeding environment on performance, injuries and behaviour in growing-finishing pigs: group-based studies. Acta Agric Scand A Anim Sci. 2000;50(4):237–49.

    Google Scholar 

  37. Gonyou HW, Lou Z. Effects of eating space and availability of water in feeders on productivity and eating behavior of grower/finisher pigs. J Anim Sci. 2000;78(4):865–70.

    Article  CAS  PubMed  Google Scholar 

  38. López-Vergé S, Gasa J, Temple D, Bonet J, Coma J, Solà-Oriol D. Strategies to improve the growth and homogeneity of growing-finishing pigs: feeder space and feeding management. Porc Health Manag. 2018;4:1–9.

    Article  Google Scholar 

  39. Averós X, Brossard L, Dourmad JY, De Greef KH, Edge HL, Edwards SA, et al. Quantitative assessment of the effects of space allowance, group size and floor characteristics on the lying behaviour of growing-finishing pigs. Animal. 2010;4(5):777–83.

    Article  PubMed  Google Scholar 

  40. Martínez-Miró S, Tecles F, Ramón M, Escribano D, Hernández F, Madrid J, et al. Causes, consequences and biomarkers of stress in swine: an update. BMC Vet Res. 2016;12(1):1–9.

    Article  CAS  Google Scholar 

  41. Gimsa U, Tuchscherer M, Kanitz E. Psychosocial stress and immunity—what can we learn from pig studies? Front Behav Neurosci. 2018;12(April):1–9.

    Google Scholar 

  42. De Groot J, Ruis MAW, Scholten JW, Koolhaas JM, Boersma WJA. Long-term effects of social stress on antiviral immunity in pigs. Physiol Behav. 2001;73(1–2):145–58.

    PubMed  Google Scholar 

  43. Turner SP, Nevison IM, Desire S, Camerlink I, Roehe R, Ison SH, et al. Aggressive behaviour at regrouping is a poor predictor of chronic aggression in stable social groups. Appl Anim Behav Sci. 2017;191:98–106.

    Article  Google Scholar 

  44. Driessen B, Van Beirendonck S, Buyse J. The impact of grouping on skin lesions and meat quality of pig carcasses. Animals. 2020;10(4):1–11.

    Article  Google Scholar 

  45. Wurtz KE, Siegford JM, Bates RO, Ernst CW, Steibel JP. Estimation of genetic parameters for lesion scores and growth traits in group-housed pigs. J Anim Sci. 2017;95(10):4310–7.

    Article  CAS  PubMed  Google Scholar 

  46. Foister S, Doeschl-Wilson A, Roehe R, Arnott G, Boyle L, Turner S. Social network properties predict chronic aggression in commercial pig systems. PLoS One. 2018;13(10):1–18.

  47. Desire S, Turner SP, D’Eath RB, Doeschl-Wilson AB, Lewis CRG, Roehe R. Analysis of the phenotypic link between behavioural traits at mixing and increased long-term social stability in group-housed pigs. Appl Anim Behav Sci. 2015;166(1):52–62.

    Article  Google Scholar 

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Acknowledgements

The authors gratefully acknowledge Joana Cardoso Pessoa, Martyna Lagoda and the Teagasc Pig Research Facility staff for their help on this study.

Funding

Jordi Camp Montoro was supported by the Teagasc Walsh Scholarship Scheme grant-in-aid project Introducing new feeding programs and facilities for Irish finishing pigs ref. 0415. The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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Authors and Affiliations

  1. Pig Development Department, Animal and Grassland Research and Innovation Centre, Teagasc, Moorepark, Fermoy, Co. Cork, P61 C996, Ireland

    Jordi Camp Montoro, Laura Ann Boyle & Edgar Garcia Manzanilla

  2. Department of Animal and Food Sciences, Animal Nutrition and Welfare Service, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain

    Jordi Camp Montoro, David Solà-Oriol & Josep Gasa

  3. Agri-Food and Biosciences Institute, Large Park, Hillsborough, Co Down, Northern Ireland, BT 26 6DR, UK

    Ramon Muns

  4. UCD Veterinary Sciences Centre, University College Dublin, Belfield, Dublin 4, D04 V1W8, Ireland

    Edgar Garcia Manzanilla

Authors
  1. Jordi Camp Montoro
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  2. Laura Ann Boyle
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  3. David Solà-Oriol
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  4. Ramon Muns
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Contributions

J.C.M, E.G.M and L.A.B conceived and designed the study. J.C.M collected the data. J.C.M and E.G.M analysed the data. J.C.M drafted the manuscript. E.G.M, L.A.B, D.S.O, R. M and J. G reviewed and edited the manuscript. E.G.M supervised the study. All authors have read and agreed to the published version of the manuscript.

Corresponding author

Correspondence to Jordi Camp Montoro.

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Ethics approval and consent to participate

Both experiments from this study received ethical approval from the Teagasc Animal Ethics Committee (TAEC 204/2018).

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Not applicable.

Competing interests

The authors declare that they have no competing interests.

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Camp Montoro, J., Boyle, L.A., Solà-Oriol, D. et al. Effect of space allowance and mixing on growth performance and body lesions of grower-finisher pigs in pens with a single wet-dry feeder. Porc Health Manag 7, 7 (2021). https://doi.org/10.1186/s40813-020-00187-7

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Keywords

Porcine Health Management

ISSN: 2055-5660

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