[pugmomsandy]

Digestive enzymes? Depending on the dose, your dog can just take the whole capsule or you can open it and mix it with his food wet or dry, each feed. This will help with food digestion. When you give enzymes in between meals, then they help the body systemically by aiding cellular function, health and repair.

http://www.whole-dog-journal.com/issues/8_10/features/15752-1.html

Or do you mean probiotics?