(Farnam) Bio Spot Defense for Dogs is a fast acting, long lasting formula 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. Contains Lanolin for coat conditioning. Fresh scent. Water resistant.