Variations in the Incidence of Tibial Dyschondroplasia Associated with Different Environmental Conditions

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Abstract
Environmental factors affecting the incidence of tibial dyschondroplasia (TD) in broiler chickens were studied. A significantly higher frequency of TD was observed in birds reared in floor pens vs. those maintained in a battery brooder with wire floors and fed the same diet. Incorporating 5% raw or autoclaved broiler litter in the diet produced no significant effect on the incidence of the disease in chicks reared in floor pens covered with wood shavings or wire frames. During the 1st 6 mo. of 1979, the incidence of TD declined markedly in market-age broilers of the same strain fed similar diets and maintained on litter in the same broiler house.