Influence of Thyroactive Iodocasein on Growth of Chicks

Abstract

Conclusions

Rhode Island Red chicks were raised to 12 weeks of age on diets containing from 0.025 to 0.2% of thyroactive iodocasein. Chicks receiving the lower levels, required less feed per gram of gain than did the controls. Those fed diets with 0.1 and 0.2 % thyroactive iodocasein gained more than the controls and were more fully feathered than either the controls or those receiving the lower levels. The thyroactive iodocasein-fed chicks utilized their feed more efficiently than the controls only during the periods when they were gaining at a more rapid rate.

Statistical analysis showed the difference in rate of gain to be of doubtful significance although the data indicate that at the proper dosage level growth rate was above normal. The differences in the rate of feathering in favor of the treated birds on higher dosage levels were highly significant.