The Bully Max Pro Series includes 31% protein and 25% fat. The formula is packed with heart-healthy flaxseed and 19 essential vitamins and minerals that pack 600 calories per cup. With less food required per serving, the Pro Series provides protein and vital nutrients. Bully Max Pro Series is available in 4 lb., 8 lb., 16 lb., 32 lb. and 48 lb. bag options.