The Response of Dairy Calves to Aureomycin Fed with a Liberal Milk and Grain Ration

The growth-promoting effect of aureomycin added to a calf ration which provided 15 to 20% of body weight daily of milk and a milk replacement mixture for the first 30 days was determined with 28 Jersey and 35 Holstein calves. The average gains of the aureomycin-fed calves exceeded those of the control calves during the milk feeding period as well as after weaning, but the differences were not statistically significant because of the wide variations in gains within each group. These results indicate that on a liberal milk feeding regime for calves growth stimulation due to aureomycin will not be attained consistently.