Keep your fur baby free of fleas with NaturVet Herbal Flea Dog & Cat Shampoo NaturVet Herbal Flea Dog & Cat Shampoo. Made with a unique blend of natural, flea-repelling ingredients of rosemary, cedarwood, geranium, and thyme, this shampoo safely removes fleas without the use of harsh chemicals. However, you can safely use it in conjunction with most flea products. Gentle enough for cats and dogs of all ages, this shampoo leaves your buddy’s skin soft and fur silky. Simply use as instructed to keep those pesky bugs off your fur baby!