The Effects of Diethylstilbestrol, Testosterone, Thiouracil, and Thyroprotein on the Chemical Composition of Broiler Carcasses

Abstract

ABSTRACT THE synthetic production of estrogenic compounds, thyroprotein preparations and goitrogenic compounds has stimulated interest in recent years in the possibility of economically using these substances in the production of meat and eggs. Some of these compounds have marked effects on rate of growth and fat deposition in chickens. It has been shown that the subcutaneous implantation of stilbestrol pellets in chickens results in greater fat deposition and an improvement in market quality of the carcasses (Lorenz, 1943, 1945; Schnetzler et al., 1945; Glazener and Jull, 1946; Andrews and Bohren, 1947; and Detwiler et al., 1950). Jaap and Thayer (1944) and Thayer et al. (1945) reported that oral administration of diethylstilbestrol to chickens was relatively ineffective in improving market quality of the carcasses and rate of fattening. It has been demonstrated that the feeding of thiouracil to broilers will increase fat deposition (Kempster and Turner, 1945; Andrews and Schnetzler, 1946; Andrews . . .