NaturVet Advanced Probiotics & Enzymes Plus Vet Strength PB6 is formulated to support and balance the digestive tract. These Probiotic Dog Soft Chews are great for dogs with sensitive stomachs and digestive issues. The GI tract can become unbalanced from stress, antibiotics, a weakened immune system or even dietary issues. NaturVet’s Advanced Probiotics & Enzymes chews have a special blend of probiotics, including veterinary-strength PB6, which helps support good bacteria in the gut. This leads to a balanced and healthy GI tract and normal stool quality. This supplement comes in the form of a bite-size chew that you can give to your pup like you would any treat.