[YEA] Cranberry extract (just a drop or two - it's potent stuff!) clears up urinary tract infections in humans and dogs (probably in cats also, but I've never tried).
Humans: dilute two drops in 8 oz. of water and drink. Use twice a day until gone (usually within 36 hours). Or just drink diluted regular cranberry juice, sugar-free.
Dogs: dilute one or two drops (depending on size of dogs) in water and squirt down throat with a medicine syringe. Use twice a day until gone (usually within 36 hours).