Studies on the Prevention of Perosis in the Chick

WORK leading to the development of a ration for the uniform production of perosis (slipped tendon) in chicks was presented in the previous paper. In this paper we wish to give the results obtained from studies on factors which prevent the development of this syndrome. Jukes (1937) has recently reviewed the meager work available on the perosis-preventing properties of certain feeds. EXPERIMENTAL Day-old White Leghorn chicks were divided into groups of five chicks each and placed in suitable cages. In the majority of the work ration 604 was used as the basal ration, but results obtained with other closely related rations are also included. The supplements tested were added at the expense of the whole ration. The results are tabulated in Table 1. It is readily evident that the addition of 15 percent of rice bran gave complete protection in all trials. The result checks quite well with the conclusion . . .