PetArmor Pro Advanced Flea & Tick Treatment for Extra Large Dogs Pet Armor Pro Advanced For Dogs acts fast and is an effective, lasting, waterproof, and easy to use application for control of fleas, ticks, and chewing lice on dogs. Use only on dogs Extra Large 89-132 lbs. NOT FOR USE ON CATS. Kill & repels fleas, ticks and mosquitoes. Kills lice. 3 Applications of Pet Armor Pro Advanced X-Large Sized Dogs