Vet quality - Contains imidacloprid, permethrin and pyriproxyfen, the active ingredients found in K9 Advantix II for Dogs | Repels - proven to Repel fleas, flea eggs, ticks, biting flies and mosquitoes. Does not require biting! | Effective - This broad spectrum flea and tick topical kills all stages of fleas, flea eggs, ticks, and lice | Easy-to-apply - four month supply, use monthly on your dog. No need to reapply after swimming or bathing. Available in four convenient weight breaks. No biting required to kill the pest. | American made - proudly made in the USA