Umbarger Show Feeds Primer Plus 13% Show Cattle Feed, 50 lbUmbarger Primer Plus 13% Show Cattle Feed contains twice the Amaferm and increased Lasalocid to prevent Coccidiosis. Umbarger Show Feeds Primer Plus is built for show cattle who are getting prepared for a sale. Achieve the needed bloom with the right amount of corn and energy, while also expanding the stomach for the full look with the right amount of fiber. Use from post weaning to sale time at 2% body weight per head per day, then switch to Breeder