I'm not sure how well cats can take juniper berries and some of the other ingredients, their pure carnivore systems are more finicky about a lot of herbs than dogs are. For cats, just to be safe, I think I might stick with a more reduced and feline proven herb collection of couch grass root, birch leaves, nettles, goldenseal, flax seed, corn silk, slippery elm, and uva ursi. Check at your local pet super store or natural health or herb store for specific feline formulas containing these herbs or just make your own blend as suggested in the previous post.