(Veterinary Products Labs) Vet-Kem Ovitrol X-Tend Spot-On for Dogs is a fast-acting, long-lasting formula that starts killing fleas and ticks within 15 minutes and prevents flea development for up to 2-1/2 months. Kills fleas, flea eggs, flea larvae, ticks, and mosquitoes on dogs and puppies over 6 months of age. Contains Etofenprox, s-methoprene, and piperonyl butoxide. Prevents flea eggs from developing into adult fleas to prevent re-infestation for up to 2-1/2 months. Kills fleas and ticks for 3 weeks. Kills and repels mosquitoes for 3 to 4 weeks. Ovitrol X-Tend comes with an X-Tender Applicator, which is specially designed to make applying flea and tick control easier, more precise, and neater than ever before. You simply insert the appropriate tube for your dog into the applicator, close it, and squeeze to apply. The applicator’s ergonomic, contoured shape makes it easy to grip, and a built-in fin helps to spread the dog's hair to allow the liquid to more readily reach the skin. The tube is sealed inside, so you can be confident that the liquid goes onto your dog, and not your hand. Contains lanolin for coat conditioning. Fresh scent. Water resistant.