- Open Access
‘Phasing out pig tail docking in the EU - present state, challenges and possibilities’
© The Author(s). 2018
- Received: 6 June 2018
- Accepted: 18 October 2018
- Published: 16 November 2018
European legislation dictates that pig tail docking is not allowed to be performed routinely (European Union. Council Directive 2008/120/EC of 18 December 2008 laying down minimum standards for the protection of pigs. OJ L 47, 18.2.2009). Nevertheless, tail docking is still practiced routinely in many European countries, while four countries stopped routine tail docking completely. Tail docking is also practiced in many countries outside Europe.
The Federation of Veterinarians of Europe (FVE), the European Association of Porcine Health Management (EAPHM) together with the European Commission carried out an online survey to investigate the situation regarding the practice of pig tail docking and the provision of enrichment material across 24 European countries. It also focuses on the role of the veterinary profession and gives an overview on published literature regarding the challenges and possibilities related to the raising of pigs with intact tails.
Fifty-seven (57) usable survey responses from 24 countries were received. On average 77% (median = 95%) of pigs are routinely tail-docked. In Finland, Norway, Sweden, Switzerland, less than 5% of the pigs are tail-docked. According to the respondents, 67% of pigs (median = 76%) across the 24 EU countries surveyed are given suitable enrichment materials. Training of veterinary practitioners, their role in advising the producer and undertaking a risk assessment of tail biting were more positively valued in countries that stopped routine tail docking than in countries that had not stopped routine tail docking. Initiatives such as training from national authorities to encourage abandoning tail docking and routine recording of tail biting at the slaughterhouse were identified as two successful items to promote the raising of pigs with entire tails.
In many European countries the majority of the pigs are still routinely tail-docked, which is a violation of the European legislation. To stop routine tail docking it is necessary to raise the awareness and education about risk factors to prevent tail biting. The growing knowledge about the reasons for failing voluntary national initiatives as well as about successful measures taken by some countries to make pig production with intact tails feasible should be distributed throughout the EU pig producing community. The veterinary profession has a significant role to play in raising awareness, facilitate knowledge transfer and to identify risk factors and solutions on farm level for the benefit of pig health and welfare.
- Animal welfare
- Enrichment materials
- Tail biting
Many piglets in Europe are routinely exposed to the cutting or cauterizing of a part of the tail in the first week after birth to prevent tail biting in their later life. This procedure is mostly done by the farmer during the first week of the piglets’ life, without any pain relief. If it is done after the piglets are 7 days old, it needs to be performed by a veterinarian with provision of analgesia/anaesthesia to provide pain relief, in accordance with the EU pig Directive .
Since 1994, European legislation has stipulated that this procedure cannot be done routinely and only if there is evidence of tail biting and if other measures have first been taken to prevent tail biting but have failed. Suggested measures to be taken include improving husbandry and environmental conditions, increasing the space allowance, modifying the management system or providing additional enrichment material.
The European Food Safety Authority (EFSA) 2007 scientific opinion  on risk factors for tail biting in pigs reported that the practice of tail docking was widespread in the vast majority of EU Member States, with percentages of 81–100% of pigs being tail docked, the only exceptions being Finland (5% of pigs tail-docked), Lithuania and Sweden (0%). Three EU Member States - Austria, Denmark and Slovenia - have specific legislation further limiting this practice, while 3 others - Finland, Lithuania and Sweden – have prohibited tail docking, unless motivated in each individual case from a veterinary perspective.
Tail biting is associated with pain, stress and frustration and negatively affects food safety . It has the potential for evoking short- as well as long-term physiological and behavioural changes indicative of pain [3, 4]. It can be triggered by a wide range of factors, often in combination, including: overstocking, feed and drinking water deficiencies or competition for these resources, incorrect or fluctuating temperature levels, inadequate ventilation, noise, draught, high levels of dust and noxious gases (i.e. ammonia), lack of opportunities to escape dominant animals, genetic factors, lack of environmental enrichment such as rooting material, and also general health problems [2, 5, 6]. If tail biting occurs, it can spread quickly through affected and neighbouring pens, can be difficult to stop and the degree of injury can increase rapidly [5, 7]. Tail biting can occur in all production systems. Danish studies which compared slaughter lesions in pigs found more tail lesions in free-range systems than in the conventional indoor system. Marked herd effects were noted [8, 9].
Often tail biting prevention is part of the farm animal health and welfare plan, which the farmer prepares together with the contracted veterinarian. Together they have to ensure that enough and appropriate enrichment material is provided and that husbandry, management and climate conditions are optimal [10, 11]. In some countries, if all these preventive steps are taken and the farmer still needs to tail-dock, the veterinarian has to sign a veterinary certificate to verify this and to justify the pigs being tail-docked. Trade issues also play a role, with some fattening farms only wishing to purchase tail-docked piglets.
Tail biting is a significant animal health, welfare and food safety problem. As a result of increased numbers of dead and runted animals after ascending abscesses it can also pose a considerable financial problem to the farmer, and increased costs for carcass handling at the slaughterhouse. An Irish study with tail-docked pigs calculated producer losses resulting from carcass condemnation and carcass trimmings to be around €1.1 per pig slaughtered . These combined losses represented a loss of 43% of the profit margin per pig, at the time of the study, attributable to tail biting. ProHealth, an FP7 Framework program, estimated the costs of tail biting in tail-docked fattening pigs at about €2 per produced pig . Tail docking is used to reduce the risk of tail biting. Nevertheless, tail docking is in itself a welfare problem, as it causes pain to the pigs, can lead to the formation of spinal abscesses, impairs the physical integrity of the animals, and facilitates suboptimal production methods from a welfare point-of-view and it does not completely remove the risk for tail biting . When evaluating the costs and benefits of tail docking, it is important to consider negative impacts of both tail docking and tail biting .
In addition to the ban on routine tail docking, European legislation requires that pigs must have “permanent access to a sufficient quantity of material to enable proper investigation and manipulation activities, such as straw, hay, wood, sawdust, mushroom compost, peat or a mixture of such” . In order to give more clarity on measures to prevent the need for tail docking and on ‘suitable enrichment’, in 2016 the European Commission adopted recommendations on tail biting and suitable enrichment materials [15, 16]. Many scientific publications also emphasized the importance of providing suitable enrichment material and the relation of it with tail biting [2, 14, 17, 18].
The aim of this paper was to analyse the progress made in the different countries regarding phasing out of tail docking. Specific attention was given to the role of veterinary practitioners in the efforts to reduce tail biting and docking.
This publication is based on an online survey, interviews with regional pig experts and an investigation of (scientific) opinions on pig tail biting, tail docking and provision of enrichment materials. The online survey on pig tail docking was designed by FVE, EAPHM and the European Commission, Directorate General for Health and Food Safety via SurveyMonkey©. It was distributed to all national veterinary organisations (specifically requesting to forward them and let them be filled in by pig experts) and to members of the EAPHM, the European College of Porcine Health Management (ECPHM) and pig experts from the European College of Animal Welfare and Behavioural Medicine (ECAWBM) between 10 April 2017 and 30 October 2017. In total, 60 surveys from 24 countries were received and 57 of them provided usable answers. The final number of respondents per country varied from 1 to 7. Each respondent was asked about the estimated percentage of i) tail-docked pigs; ii) provision of suitable enrichment materials. The survey also contained questions regarding the risk factors, challenges, slaughterhouse monitoring and role of the veterinary practitioner. All questions are listed in Appendix.
The tail docking outcome was converted into dichotomous variable to look for possible associations between variables. Each respondent was classified in one of two categories based on expert opinion on the percentages provided by the survey: 0) No-TD (No-Tail Docking): no or few tail-docked pigs (range from 0 to 5%) and 1) TD (Tail Docking): more or equal than 70% of tail-docked pigs (range from 70 to 100%). Responses from the 3 countries reporting intermediate tail docking levels were not included in this part of the analysis.
The experimental unit was the respondent. A Mann–Whitney Wilcoxon test was used to identify any significant difference between the prevalence of suitable enrichment material in countries which routinely tail-dock versus those that phased out tail docking. A chi-square test was applied to detect possible associations between the other answers given and the fact of performing routine tail docking or not. A p-value of 0.05 was considered significant for all analyses.
Percentages of pigs’ tail-docked
Percentage of pigs tail docked and pigs provided suitable enrichment material (mean, max and min) in relation to the pig population in the 24 countries surveyed
(number of usable answers)
Mean % (range)
Mean % (range)
Europe-24 total pig population
77% (median = 95%)
67% (median = 76%)
Percentage of pigs which are provided suitable enrichment materials
According to the respondents, 67% of pigs (median = 76%) across the 24 countries surveyed were provided with suitable enrichment materials. Within a country, between respondents, extensive variation was seen in the percentages regarding suitable enrichment materials (Table 1).
The percentage of suitable enrichment material was significantly different in TD-countries (Tail Docking countries) (mean 63% +/− sd 32.9%; median 70%) compared with No-TD countries (No Tail Docking Countries) (mean 89% +/− sd 14.8%; median 97%) (Z = 1.9, P = 0.048).
Awareness on European and national recommendations and initiatives regarding prevention of tail biting and tail docking
Eighty-six percent (86%) of the veterinarians declared that they were aware of the Commission Recommendation regarding tail docking (EU 2016/336)  and 69% of the accompanying Commission Staff Working Document . Fifty six percent (56%) replied they were aware of manuals, training opportunities or other supporting material developed and organised, mostly by the national governments, animal welfare councils/committees or research institutes.
Frequencies of answers in the tail docked (TD) and no routinely tail docked groups (No-TD)
No-TD (respondents from countries with no Tail Docking)
TD (respondents from countries with Tail Docking)
Awareness of Commission Recommendations
Awareness of Commission Staff Working Document
Training for veterinary practitioners
Animal welfare advisory group
Role of veterinary practitioners
Low involvement or importance
Policy for veterinary certificates
Recording of tail biting at the slaughterhouse
Effectivity of national initiatives
Not very effective/not effective
National initiatives and the role of veterinary practitioners
Eighty (80%) of No-TD countries respondents thought national initiatives to reduce tail docking were “(very) effective” against only 3% in TD countries (p < 0.001).
The role of the veterinary practitioner was seen as (very) important by 100% participants from the No-TD group against 66% from the TD group (P = 0.07) (Table 2). Nobody replied that veterinarians have a deciding role.
Recording of tail biting or tail docking at slaughterhouses
Recording of tail biting at the slaughterhouse was reported by 100% participants from the No-TD countries against 45% from the TD countries (P = 0.003) (Table 2).
Most important practices suggested to prevent tail biting and to avoid routine tail docking of pigs
The main challenges preventing veterinarians to advise to stop tail docking
Top 3 benefits to farms not performing tail docking
The main benefits of not performing routine tail docking given were: 1/ improved animal welfare for the pigs, by avoiding the pain from the tail docking itself and the risk of consequent infections (46%), 2/ less labour and time input (15%), 3/ economic benefit for higher price with a label that requires intact tails and 4/ improved public image of pig farming (12%).
Countries having stricter regulations on tail docking
Non exhaustive list of countries having stricter legislation then the EU Directive in relation to tail docking
Legislation stricter than EU Directive
Stricter legislation regarding rooting material, cooling, solid/drained floors and hospital pens, tail should be docked as little as possible (not more than ½ of the tail), if performed after the 4th day of life, piglets should be given long-lasting analgesia
Veterinarian has to make the decision
Tail docking is forbidden since 2003, lower legal stocking densities
It is only allowed to tail-dock piglets up to an age of 4 days. If older, it has to be done by a veterinarian with anaesthesia (§5 TierSchutzGesetz). Since 2018, also stricter requirements apply regarding enrichment materials and a guidance to cut maximum 1/3 of the tail
Amputation of tails for medical reasons can only be performed by veterinarians Regulation for Housing of Swine of 2003, using anaesthesia and prolonged analgesia. As a consequence, it is not carried out any more Paragraph 10
Tail docking is not allowed (SFS 1988:534 Paragraphs 2,4,10)
Removed from the list of mutilations that can be performed without anesthesia Animal Protection Ordinance, 2001
For most countries, reliable statistical data is not available on the amount of pigs with docked tails, tail biting lesions and how many pigs are provided with suitable and sufficient enrichment materials. The present survey relied upon a limited number of answers of experts in pig production from different countries despite reaching out extensively. This shows the need for more data collection on this topic. While the results presented in this document indicate the situation per country, it should be recognised that this might not reflect the situation in the whole of Europe, nor give a complete picture.
Little progress in preventing tail docking
Four countries stand out, namely Finland, Norway, Sweden and Switzerland, as they stopped tail docking almost completely, without large problems with tail biting.
Most EU countries literally transcribed the EU pig directive text  in their national legislation. Exceptions to this are Denmark, Estonia, Finland, Norway, Sweden and Switzerland, which introduced stricter legislation (Table 3). Stricter implementation and control of the current legislation to enforce it properly, would be beneficial to pig welfare and also create a more level playing field for producers in different EU countries.
Providing enrichment materials is vital to prevent tail biting, but not enough alone
While the legislation requires permanent access to a sufficient quantity of suitable enrichment and in details describes what is ‘suitable’ and ‘sufficient’, our survey results show that in reality knowledge and awareness is lacking. Only 67% of pigs (median = 76%) across the 24 EU countries surveyed were said to be given suitable enrichment materials. The association between providing suitable enrichment material and routine tail docking was significantly. The four countries that stopped tail docking replied to almost give all pigs sufficient and suitable enrichment material. Lack of proper enrichment material and need for appropriate space allowance were identified as the two main risk factors for tail biting. This expert opinion is in accordance with risk factors studies [2, 5, 6, 22, 23]. Several publications demonstrate that enrichment material and more specifically clean and fresh straw can substantially reduce the risk of tail biting . Larsen  showed that a moderate amount of straw (150 g/pig/day) reduced the risk of injurious tail biting by more than two-fold, while docking reduced the risk by more than four-fold. Combining straw and increased space (1.2 m2 per pig) reduced the risk in undocked pigs to the same level as found in docked pigs kept under high stocking density (0.72 m2 per pig) without straw.
Tail docking has been reported as the most commonly applied management tool used to prevent tail biting. Hunter  recorded tail biting in 2.4% of docked and 8.5% of long-tailed pigs in the UK. In some cases, tail docking has reduced the prevalence of tail biting by up to 66% . However, tail docking does not prevent tail biting completely. For example, sampling 18,500 docked pigs in French slaughterhouses in 2017, they found 62.6% of pigs having mild tail lesions and 2.21% with severe tail biting lesions .
Looking at the four countries that stopped tail docking almost completely, production systems are characterized by the use of enrichment materials (often straw), reduced stocking rates and high standards in relation to thermal comfort and air quality, health status, competition for food and space, and diet . Both Sweden as Finland have a higher legally required space allowance than stipulated in the EU Directive . A study interviewing Swedish pig farmers found that straw was used in 98% (61% straw only, 37% straw supplemented with other enrichment materials e.g. wood shavings) . A Swiss study  showed that tail biting in undocked pigs can be reduced to similar levels as for docked pigs when the environment is suitably enriched.
Despite reporting high mean percentages of pigs having access to suitable enrichment material several countries still tail-docked more than 70% of pigs. This result may be explained through three main hypotheses: i) Due to the multifactorial nature of the problem [2, 6, 26], it may be difficult to predict and completely prevent episodes of tail biting ; ii) Another explanation is that of habit, i.e. the tendency to continue doing what has usually been done, and limited knowledge about the alternatives; iii) Yet another explanation is that raising pigs with intact tails may cost more, as a result of decreasing the stocking density, providing more enrichment material, and the labour costs involved including keeping a closer eye on any tendencies of tail biting.
Measuring as precondition for improvement
Recording of tail biting at the slaughterhouse seems an important precondition for improvement. Recording was done in all countries which stopped routine tail docking against only 45% in the countries where tail-docking was common. Serious tail biting lesions should normally be recorded as part of the standard meat inspection system . However, slaughterhouse data indicate that tail biting remarks from meat inspection data tend to severely underestimate on-farm prevalence of tail lesions [31, 32].
It is crucial to set up an effective monitoring program, both on farm as at the slaughterhouse, which records tail biting lesions and percentage of docked pigs. For monitoring and benchmarking purposes, both nationally as on a European scale, a grading scale should be developed to score tail docking (length of docking) and both old and new tail bite damage in a systematic, standardized way .
EUWelNet, a coordinated European Animal Welfare Network, has developed standardised training for EU inspectors in respect to provision enrichment materials, tail biting and tail docking .
Preventing tail biting as part of herd health management
Seen the multi-factorial nature of tail biting [2, 6, 26], it needs a holistic health, welfare and biosecurity approach [14, 17]. While the deciding role to tail-dock or not, is up to the farmer, the farm veterinarian has an important role in doing a farm specific risk assessment and advising the farmer [10, 11]. Overall, 70% of the respondents see the role of vet practitioner as (very) important. Studies also showed that record keeping through an advisory service can help to lower the risk of tail biting, which is associated with improved farm performance [34, 35].
Some countries or farm assurance systems only allow farmers to tail-dock pigs after a veterinarian has issued a veterinary certificate or a veterinary statement . However, most countries or veterinary practices do not have clear policies and guidelines when and after which assessment a certificate/statement can be issued. Every veterinary certificate issued should always follow the FVE 10 principles of certification . These request amongst others that a veterinarian has to 1/only certify issues that he/she can ascertain 2/ avoid conflict of interest and 3/ does not allow economic or other pressures to compromise his/her impartiality.
Following the legislation, a veterinary certificate/ statement should only be given if the veterinarian has evidence of tail biting in the stable, when appropriate and sufficient enrichment material is present and after the farmer has tried to change e.g. housing, climate or stocking density.
National action plans: Need for close collaboration between government, veterinary profession and pig industry
Our results show that countries that have stopped routine tail docking invest more in training for veterinary practitioners. The EU has requested all member countries to draw up an action plan to prevent tail docking by summer 2018. To make this plan work, it will be vital to work in close collaboration with the national pig veterinary practitioners and the pig industry in the country. Monitoring tail biting and tail docking and developing training materials and guidance should be part of the action plans. Several countries already developed support materials, such as Belgium , Denmark , Ireland , Spain  and the UK . On a European level, materials were developed by FareWellDock  and the European Commission .
It is important to ensure that such useful materials reach all pig veterinarians and pig farmers in Europe.
In the EU, routine tail docking is banned since 1994. Nevertheless, our study shows that the majority of pigs are still tail-docked. EU countries are developing national action plans to improve implementation and enforcement of the legislation. Our results show that it will be vital for countries to raise awareness and work out these plans in close collaboration with national pig veterinary practitioners and the pig industry. Private veterinarians in collaboration with all other actors have an important role to play in advising and supporting farmers. Monitoring tail biting and tail docking, both on farm as at the slaughterhouse, and developing training materials and guidance should be part of the above-mentioned plans. Veterinary certification can play a role, but should only be provided upon fulfilment of clearly specified criteria, based on proper investigations and clearly verifiable by the veterinarian and the authorities.
The authors are grateful to all organisations and institutions who supported this survey, namely the European Association of Porcine Health Management, the European Commission DG Sante and the Federation of Veterinarians of Europe. We are also very grateful for all the national veterinary associations who helped distributing the survey. We express our gratitude to all pig experts who shared with us their knowledge. Last but not least we are grateful for all veterinarians specialised in pigs who filled in the survey. Without them, this publication would not exist.
No funding was provided.
Availability of data and materials
Data are available from the corresponding author upon request.
All authors contributed to the study conception and design. NDB programmed the survey online and supervised data acquisition. NDB and DB contributed to interpretation of the data. DB performed the statistical analysis. NDB and DT drafted first draft of manuscript. All authors read, critically revised and approved the final manuscript.
Ethics approval and consent to participate
Participation in the survey was completely voluntary. Participants were informed before starting the survey about the methodology for collecting, using and sharing the data and that consent for using the data as specified was implied when participating. All data was anonymised and no personal data was processed.
Consent for publication
All authors consent to the publication of the present manuscript.
The authors declare that they have no competing interests.
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- European Union. Council Directive 2008/120/EC of 18 December 2008 laying down minimum standards for the protection of pigs (Codified version). Official J Europ Union. 2009;L47:5–13.Google Scholar
- EFSA (European Food Safety Authority). Scientific opinion of the panel on animal health and welfare on a request from commission on the risks associated with tail biting in pigs and possible means to reduce the need for tail-docking considering the different housing and husbandry systems. EFSA J. 2007;611:1–13.Google Scholar
- Di Giminiani P, Nasirahmadi A, Malcolm EL, Leach MC, Edwards SA. Docking piglet tails: how much does it hurt and for how long? Physiol Behav. 2017;182:69–76.Google Scholar
- Di Giminiani P, Edwards SA, Malcolm EL, Leach MC, Herskin MS, Sandercock DA. Characterization of short- and long-term mechanical sensitisation following surgical tail amputation in pigs. Sci Rep. 2017;7(1):4827.Google Scholar
- D’Eath RB, Arnott G, Turner SP, Jensen T, Lahrmann HP, Busch ME, et al. Injurious tail biting in pigs: how can it be controlled in existing systems without tail docking? Anim. 2014;8:1479–97.View ArticleGoogle Scholar
- Sonoda LT, Fels M, Oczak M, Vranken E, Ismayilova G, Guarino M, Viazzi S, Bahr C, Berckmans D, Hartung J. Tail biting in pigs--causes and management intervention strategies to reduce the behavioural disorder: a review. Berl Munch Tierarztl Wochenschr. 2013;126(3–4):104–12.PubMedGoogle Scholar
- De Briyne N. Private communication, 2017.Google Scholar
- Kongsted H, Sørensen JT. Lesions found at routine meat inspection on finishing pigs are associated with production system. Vet J. 2017;223:21–6.View ArticleGoogle Scholar
- Alban L, Petersen JV, Busch ME. A comparison between lesions found during meat inspection of finishing pigs raised under organic/free-range conditions and conventional, indoor conditions. Porcine Health Manag. 2015;1:4.View ArticleGoogle Scholar
- British Pig Association. Template BPA Plan for Pig Health. 2008. http://www.britishpigs.org.uk/BPA%20FHP%20Template.pdf. Accessed 2 Sept 2018.
- Red Tractor. Red tractor quarterly veterinary report. 2017. https://assurance.redtractor.org.uk/contentfiles/Farmers-6833.docx?_=636403772515860788. Accessed 2 Sept 2018.
- Harley S, Boyle LA, O’Connell NE, More SJ, Teixeira DL, Hanlon A. Docking the value of pigmeat? Prevalence and financial implications of welfare lesions in Irish slaughter pigs. Anim Welf. 2014;23(3):275–85.View ArticleGoogle Scholar
- Prohealth. Production diseases: the cost to pig producers. Prohealth Newsl. 2015. http://www.fp7-prohealth.eu/newsindex/newsletter-november-2015/production-diseases-cost-pig-producers/.
- Valros A, Heinonen M. Save the pig tail. Porcine Health Manag. 2015;1:2.View ArticleGoogle Scholar
- European Union. Commission Recommendation (EU) 2016/336 on the application of Council Directive 2008/120/EC laying down minimum standards for the protection of pigs as regards measures to reduce the need for tail-docking. Offical J Europ Union. 2016;L 62:20Google Scholar
- European Union. Commission staff working document on best practices with a view to the prevention of routine tail-docking and the provision of enrichment materials to pigs. SWD(2016) 49 final. https://ec.europa.eu/food/sites/food/files/animals/docs/aw_practice_farm_pigs_stfwrkdoc_en.pdf. Accessed 2 Sept 2018.
- Valros A, Munsterhjelm C, Hänninen L, Kauppinen T, Heinonen M. Managing undocked pigs – on-farm prevention of tail biting and attitudes towards tail biting and docking. Porcine Health Manag. 2016;2:2.View ArticleGoogle Scholar
- Studnitz M, Jensen MB, Pedersen LJ. Why do pigs root and in what will they root? A review on the exploratory behaviour of pigs in relation to environmental enrichment. Appl Anim Behav Sci. 2007;107:183–97.View ArticleGoogle Scholar
- Dijksma S, Bucht SE, Schmidt C, Jorgenson D. Joint declaration in respect to pig welfare. 2015. http://www.bmel.de/SharedDocs/Downloads/Tier/Tierwohl/GemeinsameErklaerungSchweinehaltung-DK-NL-SE-DE-englisch.pdf;jsessionid=C92EDCACC2E604DEC0B45962C469F46B.1_cid358?__blob=publicationFile. Accessed 2 Sept 2018.
- European Commission. Overview report Study Visits on Rearing Pigs with Intact Tails. 2016. http://ec.europa.eu/food/audits-analysis/overview_reports/act_getPDF.cfm?PDF_ID=790. Accessed 2 Sept 2018.
- European Parliament. Routine tail docking of pigs. Study for the PETI Committee. IPOL_STU(2014)509997. http://www.europarl.europa.eu/RegData/etudes/STUD/2014/509997/IPOL_STU(2014)509997_EN.pdf. Accessed 22 Oct 2018.
- Schrøder-Petersen DL, Simonsen HB. Tail biting in pigs. Vet J. 2001;162:196–210.View ArticleGoogle Scholar
- Temple D, Courboulay V, Velarde A, Dalmau A, Manteca X. The welfare of growing pigs in five different production systems in France and Spain: assessment of health. Anim Welfare, Volume 21, Number 2, May 2012, pp. 257–271(15).View ArticleGoogle Scholar
- Wallgren T, Westin R, Gunnarsson S. A survey of straw use and tail biting in Swedish pig farms rearing undocked pigs. Acta Vet Scand. 2016;58:84.View ArticleGoogle Scholar
- Larsen M, Andersen H, Pedersen L. Which is the most preventive measure against tail damage in finisher pigs: tail docking, straw provision or lowered stocking density? Anim. 2017:1–8.Google Scholar
- Hunter EJ, Jones TA, Guise HJ, Penny RHC, Hoste S. The relationship between tail biting in pigs, docking procedure and other management practices. Vet J. 2001;161:72–9.View ArticleGoogle Scholar
- Kritas SK, Morrison RB. Relationships between tail biting in pigs and disease lesions and condemnations at slaughter. Vet Rec. 2007;160:149–52.View ArticleGoogle Scholar
- IFIP study in French Slaughterhouses 2017: https://circabc.europa.eu/sd/a/362f9971-7f5c-4ece-93b2-560efc445e73/National%20Plan%20on%20Tail%20Docking%20(FR)_LALOY%20F%20%26%20HUET%20R_2017_EN.pdf. Accessed 2 Sept 2018.
- Cagienard A, Regula G, Danuser J. The impact of different housing systems on health and welfare of grower and finisher pigs in Switzerland. Prev Vet Med. 2005;68(1):49–61.View ArticleGoogle Scholar
- FVE. FVE guidance document on Food Chain Information. 2015 http://www.fve.org/uploads/publications/docs/005_fci_guidance_fci_adopted_full_document.pdf. Accessed 2 Sept 2018.
- Lahrmann H, Busch M, D’Eath R, Forkman B, Hansen C. More tail lesions among undocked than tail docked pigs in a conventional herd. Anim. 2017;11(10):1825–31.View ArticleGoogle Scholar
- Keeling L, Wallenbeck A, Larsen A, Holmgren N. Scoring tail damage in pigs: an evaluation based on recordings at Swedish slaughterhouses. Acta VetScand. 2012;54(1):32.Google Scholar
- EUWellNet. Training resource on tail biting in pigs. 2013. http://www.euwelnet.eu/en-us/euwelnet-pig-training/. Accessed 2 Sept 2018.
- van Staaveren N, Teixeira DL, Hanlon A, Boyle LA. Pig carcass tail lesions: the influence of record keeping through an advisory service and the relationship with farm performance parameters. Anim. 2017;11(1):140–6.View ArticleGoogle Scholar
- Scollo A, Gottardo F, Contiero B, Edwards SA. A cross-sectional study for predicting tail biting risk in pig farms using classification and regression tree analysis. Prev Vet Med. 2017;146:114–20. https://doi.org/10.1016/j.prevetmed.2017.08.001.View ArticlePubMedGoogle Scholar
- FVE. 10 principles of certification. 2014. http://www.fve.org/uploads/publications/docs/061_fve_10_principles_of_veterinary_certification_adopted.pdf. Accessed 2 Sept 2018.
- Belgian Federal Government. Staartbijten voorkomen zonder coupure. 2013. http://www.varkensloket.be/Portals/63/Documents/GR_201302_Staartbijten_voorkomen_zonder_coupure_DIGIdef.pdf. Accessed 2 Sept 2018.
- Danish Agriculture and Food Council. Pig Industry Quality Manual. 2017, 5th Edition. https://www.lf.dk/~/media/lf/aktuelt/publikationer/svinekod/2018/qsg-english-2017.pdf?la=da. Accessed 2 Sept 2018.
- Farm Animal Welfare Advisory Council (FAWAC). Code of practice for the welfare of pigs. 2009. http://www.fawac.ie/media/fawac/content/publications/animalwelfare/CodePracticePigWelfare.pdf. Accessed 2 Sept 2018.
- Ministerio de Agricultura y Pesca, alimentacion medio ambiente. Document on the management of pig holdings to avoid the risk of tail biting. 2017. http://www.mapama.gob.es/es/ganaderia/temas/produccion-y-mercados-ganaderos/20171031documentosobregestiondelasexplotacionesparalaprevenciondelraboteo_tcm30-441875.pdf. Accessed 2 Sept 2018.
- AHDB. A Practical Guide to Environmental Enrichment for Pigs. https://pork.ahdb.org.uk/media/273607/enrichment-guide-2017.pdf. Accessed 2 Sept 2018.
- FareWellDock. Tail biting, tail docking, health and enrichment in pigs. 2017 http://farewelldock.eu/. Accessed 2 Sept 2018.
- European Commission. Leaflet and videos regarding cutting the need for tail docking. 2017. https://ec.europa.eu/food/animals/welfare/practice/farm/pigs/tail-docking_en. Accessed 2 Sept 2018.