The relationship between tail biting in pigs, docking procedure and other management practices

The tail length (docked, tipped or undocked) and tail status (bitten or unb itten) of 27 870 pigs from 450 units was recorded at six UK abattoirs. A fa rm survey of the final finishing stage was used to investigate the relation ship between management practice and tail biting. This showed that docking was the most important factor influencing the probability of being not bitt en, with 2.4% of docked and 8.5% of long-tailed pigs being tail-bitten. The following factors reduced the probability of long-tailed pigs being tail-b itten; light straw provision, use of natural ventilation or artificially co ntrolled natural ventilation (ACNV), mixed sex grouping, meal or liquid fee ding, and use of double or multi-space feeders. Docked and long-tailed pigs provided with light straw and natural ventilation/ACNV had levels of tail biting of 1.2% and 4.3% respectively; 3.9% of docked pigs with artificial v entilation and no straw were tail-bitten. Long-tailed pigs fed via double o r multi-space feeders also had 3.9% of tails bitten. (C) 2001 Harcourt Publ ishers Ltd.