The UltraCruz Canine Probiotic Supplement for Dogs supplies a comprehensive collection of key prebiotics and probiotics to help maintain digestive health in dogs and puppies. This probiotic supplement is provided as tasty chews and may be especially beneficial to help dogs maintain digestive health during stressful events, such as changes in diet, antibiotic therapy, travel and kenneling. Prebiotics are sources of non-digestible, soluble fiber that serve as food for probiotics to help increase the number of beneficial bacteria present in the large intestine. Probiotics are live microorganisms given to help promote healthy digestive and immune function. Comes in a 120 ct. package.