For docking pig tails, During
tail docking the tails of newborn piglets are burnt off and by this the
vessels close simultaneously. Pathogens cannot penetrate when the
vessels are sealed immediately. Generally tails are docked to a length
of 2 to 3 cm. The reason for tail docking is to avoid cannibalism among
pigs that might take place if tails remain long during rearing and
fattening.