Effects of Vitamin B12 and Crystalline Aureomycin on Growth of Poults

It has recently been reported that crystalline aureomycin will accelerate growth of young turkeys (Stokstad and Jukes, 1950). The pertinent literature was reviewed by these authors. The present studies, which had been completed prior to the appearance of the paper by Stokstad and Jukes, confirm and extend the work cited, inasmuch as similar results were obtained with a different basal diet, different variety of turkeys, and with separate sexes. The basal diet used had the following composition: solvent process soybean meal (48% crude protein) 50, bonemeal 3.7, limestone 1.5, salt 1.0, cottonseed oil 1.0, dl -methionine 0.5, manganese sulfate 0.03, and glucose to complete 100 parts. Vitamin supplements per 100 grams of basal diet were as follows: vitamin A 700 I.U., vitamin D 70 A.O.A.C. chick units, riboflavin 1 mg., niacin 1 mg., thiamin 0.3 mg., choline chloride 100 mg. Broadbreasted Bronze poults were separated as to sex at 1 day . . .