Pennyroyal is a 50:1 ultra concentrated shampoo that contains no pennyroyal. Pennyroyal is safe flea alternative and is a must for summer season! Pennyroyal is made with natural oils, herbs and extracts. Pennyroyal also gently cleans without drying the skin or coat. Pennyroyal is great on cats, kittens, puppies and rabbits. Safe for dogs, horses, ferrets & farm animalsImportant InformationWhile we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer.While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer.