Calf Scour Bolus is recommended for oral administration for the control and treatment of the following diseases of beef and dairy calves caused by organisms sensitive to oxytetracyline: bacterial enteritis caused by Salmonella typhimurium and Escherichia coli (colibacillosis); bacterial pneumonia (shipping fever complex, pasteurellosis) caused by Pasteurella multocida. Safe for use in both beef and dairy calves. NO pre-slaughter withdrawal period. Each bolus contains 500mg of oxytetracycline hydrochloride for noticeable improvement signs in as little as 24 hours. Half scored boluses allow for more accurate dosage.