Risk factors for reason-specific culling of dairy cows

摘要: Abstract A set of 7763 Holstein lactations from 34 New York herds was used to explore the influences production and 13 diseases on culling. Dying predicted by high milk yield downer cow syndrome. The cows most likely be sold for dairy purposes were those with shorter previous-lactation calving intervals, lower per calving-interval day in previous lactation, who calved summer, or had clinical mastitis. Lower estimated transmitting ability milk, interval summer (but not mastitis) risk factors low production. Having > 3 services, aborting having cystic ovary associated culling poor reproduction. Culling udder problems day, higher current mastitis teat problems. Cows ability, dystocia, foot leg at feet legs. miscellaneous reasons left displaced abomasum.