Antibiotics and the Growth of Ducks

A NUMBER of investigators have shown that the inclusion of an antibiotic or a combination of antibiotics, either in crude or pure form, in the ration of young chicks and/or turkey poults, results in improved growth—Almquist and Merritt (1951), Atkinson and Couch (1950, 1951, 1952), Bird et al. (1951), Branion and Hill (1951), Coates et al. (1951 a, b), Cuthbertson (1952), Davis and Briggs (1951), Dixon and Thayer (1951), Groschke (1950), Groschke and Evans (1950), Halbrook and Beeckler (1951), Harned et al. (1948), Heuser (1951), Heuser and Norris (1952), Heywang (1952), Kramke and Fritz (1951), Kratzer (1952), Lewis and Sanford (1952), Lillie and Bird (1952), MacGregor et al. (1952), Matterson et al. (1951, 1952 a), McGinnis (1950), McGinnis et al. (1950, 1951), Moore et al. (1946), Patrick (1951), Peppler et al. (1950), Reynolds et al. (1951), Robertson (1950), Rosenberg et al. (1952), Runnels et al. (1951), Sanford (1952), Sieburth et al . . .