I purchased it from Dr. Fosters and Smith. Its called Pet Authority Digestive Conditioner. Ingredients: Triple filtered spring water, lactobacillus cultures, caltures, yucca shidigera, cranberry juice concentrate, taurine, and Vitamin E.
It is for the digestive system and to help prevent UTI's. Chicken has had 2 UTI's in the past year and a half. She was on a AB so I purchased this to help counteract the side effects of the AB.