125 Servings for a 26-50lb Dog! Provides Support for the Bladder and Urinary Tract. 2 Simple Ingredients: Cranberries, Wild Blueberries. Naturally dense in Proanthocyanidins (P.A.C.'s). P.A.C.'s Prevent the Adhesion of Bacteria on the walls of the bladder and Urinary Tract. High in Natural Antioxidants. Cranberries and Blueberries have been proven to prevent infection in the bladder and urinary tract by way of natural anti-adhesion compounds called PROANTHOCYANIDINS (P.A.C.' s). P.A.C.' s block the adhesion of bacteria on the mucosal walls of the bladder and urinary tract by forming a slippery barrier. Once the P.A.C.' s have done their job and have created the slippery barrier, bacteria are unable to adhere or 'Å“stick'  to the lining and are washed away in the urine. P.A.C.' s also promote a healthy immune response due to their proven Anti-Inflammatory and Antioxidant properties. Additional benefits beyond Urinary Tract and Bladder support are that these compounds support healthy teeth, gums, eyes and cardiovascular health.