Horsetail can help cleanse your pet's urinary tract and help deal with infections, inflammation, and painful urination. Dandelion is a safe but powerful diuretic and liver stimulant. It is rich in potassium, which helps replenish the minerals lost in the urine. Dogs and cats are prone to kidney, bladder, and urinary tract infections. Cranberries are potent antioxidants that help boost the immune system and decrease inflammation. Cranberries are one of the most common natural prevention of urinary tract infections because the present phytochemicals prevent bacteria from sticking to the urinary tract walls.