Claw diseases as a factor for changes in dairy cows' behaviour and milk production

摘要

Digital dermatitis (DD) and sole ulcer (SU), two of the most important claw diseases causing lameness in dairy cows, are discussed. DD is an increasing problem in many countries. SU can result in serious complications and is one of the most costly claw diseases because of long term recovery, effects on fertility, production level and increased risk of premature culling. Claw diseases are often not recognized promptly and cows may suffer from pain and discomfort, which is manifested in lameness. Footdiseases and lameness also affect dairy cows' resting, social and avoidance behaviour. Lameness can persist for a considerable period of time and results in reduced productivity and economical losses for the dairy industry. Both from an animal welfare aswell as from an economic point of view it is essential to prevent foot diseases or treat them at an early stage before lameness is evident, and maintenance foot trimming is a good preventative tool for this purpose.