Pennyroyal™ shampoo is a 32-1 rich and creamy concentrate. Pennyroyal™ is formulated for mild cleaning with powerful results and lots of lather. Pennyroyal™ is a must for the summer season. It's mild, pH balanced, natural, biodegradable with light fresh scent. Formulated for dogs, cats, horses, puppies, kittens, ferrets & farm animals.