Читать книгу Veterinary Treatment of Pigs - Graham R Duncanson - Страница 88

This is more commonly seen in aggressive breeds. Removal of the sharp enamel points on the canine teeth soon after birth often does not help this vice, which is often seen soon after weaning. Poor palatability of diets tends to cause poor growth rate, unthriftiness and an increased attraction to blood. Low iron levels might also increase the attraction to blood. Nowadays all indoor pigs receive an injection of 1 ml of iron dextran soon after birth and so iron levels are adequate during the suckling period. However, if levels of iron in the creep are not adequate then pigs may show this vice in the immediate post-weaning period. Ear biting may be seen in pigs which have skin lesions as a result of porcine reproductive and respiratory syndrome (PRRS).