A survey of mortality in three adult broiler breeder flocks

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Abstract
A survey was carried out on the causes of mortality in three broiler breeder flocks during the laying period from May 1976 to February 1977. Five hundred and forty‐two birds were examined. The commonest causes of death in the females were reproductive disorders (24.9%), cellulitis or injury due to cannibalism (24.0%), kidney lesions (9.5%), liver haemorrhage (7.1%), Marek's disease (4.9%) and staphylococcal synovitis/tenosynovitis (4.1%). Mortality in the males was due mainly to staphylococcal synovitis/ tenosynovitis (33.8%) and acute heart failure (14.3%).