VetriScience Vetri-Mega Probiotic (120 Capsules) for Dogs & Cats by Vetri-Science Laboratories Contains 8 viable probiotic strains from non-dairy sources to support proper digestive tract health during times of G.I. upset. Also included is FOS, a soluble fiber and prebiotic to support the natural proliferation of intestinal probiotics. Feeding Directions for Dogs and Cats: For Dogs: Up to 40 lbs: 1 capsule daily Over 40lbs: 2 capsules daily Give products preferably after a meal. For Cats: Give 1/2 capsule daily mixed with food.