Hartz UltraGuard Rid Flea and Tick Shampoo provides immediate relief to your dog from fleas and ticks. The cleansing formula is especially designed to kill fleas and ticks, including the deer tick which may carry Lyme disease. This shampoo has a pleasant, fresh fragrance and cleans, deodorizes, and beautifies your dog. Shampoo is safe to use on puppies as young as 12 weeks. Please be sure to always use dog products on dogs and cat products on cats, as they cannot be used interchangeably.