Effect of Terramycin and Vitamin B12 on Hatchability.

Abstract
An expt. was conducted with White Leghorn pullets to determine the effect of feeding terramycin alone and in combination with vit. B12 on egg production and hatchability. The results obtained indicate that terramycin had little or no effect on egg production and gain in wt. In the absence of vit. B12, hatchability of fertile eggs was improved by feeding terramycin. There was an indication that terramycin fed in combination with vit. B12 further improved hatchability.