First Defense is an oral capsule for newborn calves that contains antibodies which aid in the reduction of morbidity and mortality from neonatal calf scours caused by K99+ E. coli and bovine coronavirus. This easy-to-use calf supplement integrates seamlessly into newborn calf care and livestock health products protocols. Administer with a balling gun (sold separately; CDMV Code 116580) for quick, convenient delivery. Available in 5-cap and 30-cap formats for individual or herd use, making it a practical cattle supplement for calving season.