Abstract
The diet recommended by the ANRC Reference Chick Diet Committee (1956) contains a combination of 90 grams arsanilic acid and 4 grams procaine penicillin G per ton as the antibiotic supplement. Heywang (1957) reported that the average increase in the weight and efficiency of diet utilization of meat-type chicks during hot weather were about the same when their diet contained a combination of one gram procaine penicillin G and 3¾ grams of either chlortetracycline or oxytetracycline per ton as when it contained 50 or 100 grams of either alone.It was considered of interest to determine whether the combination we used was as effective as the one recommended by the Committee, and also to obtain comparative data on an antibiotic (erythromycin) which had not been fed at the station. Five experiments were conducted during hot weather in two consecutive summers, two of them with New Hampshires and three with New …
Published Version
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