Vet's Best Probiotic Soft Chews for dogs helps support & maintain digestive health, a critical component of your dog's daily comfort & happiness, with 1.5 Billion CFU (Colony Forming Units) & active cultures of 6 strains of bacteria in a One-A-Day soft chew supplement. A stabilized source of bacteria maintains proper gastrointestinal balance to help support a normal healthy appetite & proper digestion. Each chew contains Bacillus Subtilis & Bacillus Licheniformis, two highly beneficial bacteria strains, coated with a patented technology to keep them stable until they enter the digestive tract.