Case study: Outbreaks of disease in adult dairy cows (or the perils of purchasing cattle from Europe!)



Many dairy farmers are keen to increase cow numbers. This desire is often hampered by the difficulty in generating herd replacements, so that purchase of surplus animals from other farms may be an attractive proposition. Rapid expansion of a dairy herd in West Sussex, by the apparently simple route of importing European heifers, led to the introduction of several diseases. This article describes the problems encountered and the subsequent management of them.