CystoPro for Dogs & Cats 30 CapsulesCystoPro for Dogs & Cats 30 Capsules Supporting Canine and Feline Urinary Health CystoPro contains an active ingredient derived from cranberries. This active ingredient is a class of antioxidants called Proanthocyanidins (PACs). CystoPro also contains probiotics, prebiotics and N acetyl D glucosamine. Ingredients: Proanthocyanidins (Type A PACs) Proanthocyanidins are naturally occurring powerful antioxidants extracted from the North American