Antibiotics for the Prevention of Bloat in Cattle Grazing Ladino Clover

Abstract
Oral administration of chlortetracycline, oxytetracycline, bacitracin, streptomycin and penicillin for prevention of bloat in steers grazing on Ladino clover was studied. Penicillin was the only antibiotic studied that prevented bloat when a single dose of 300 mg or less was given. Single doses of 25 to 75 mg of procaine penicillin protected steers from bloat for about 2 days. Potassium penicillin was equally as effective as procaine penicillin. Penicillin had to be given several hours or overnight before it was effective in preventing bloat in steers that were bloating before treatment.