Fig. 2From: Application of the voluntary human approach test on commercial pig fattening farms: a meaningful tool?Prevalence of the time until the first contact [s] (TUFC) according to group size (1 = 1–12, 2 = 13–20, 3 = 21–35, 4 = 36–50, 5 = 51–100, 6 > 100 pigs per pen)Back to article page