Protect Um for Dogs & Cats is a natural protection against fleas, lice, ticks & other insects. Protect-um contains a blend of natural ingredients like Garlic, Brewer's Yeast & B-vitamins which when absorbed into the bloodstream, help to render your dog unattractive to insects. They generate an odour that is unappealing to the insect. Protect-um does not kill insects, it simply aids in keeping infestation at bay. Protect-um will also contribute to a healthier balanced diet as it contains important B vitamins.