Proviable is a clinically researched multi-strain probiotic supplement for dogs containing billions of colony forming units (CFUs) of beneficial bacteria that help support a healthy intestinal balance. Proviable contains both prebiotics and probiotics to help support intestinal health. The prebiotics help support the growth of the beneficial Proviable probiotics within the gut. Proviable Digestive Health Supplements are brought to you by Nutramax Laboratories Veterinary Sciences . the #1 veterinarian recommended supplement company. *Source: Survey conducted among small animal veterinarians who recommended animal supplements.