The adult fleas that you see on your pet only represent 5% of the total flea population. For every adult flea you see, there are about 20 more fleas in the immature stages (eggs, larvae, pupae) living in your pet's environment. It is important that flea products for both the pet and the pet's environment include an adulticide that kills the adult flea, and an insect growth regulator that kills the immature stages. All household pets should be treated at the same time to ensure optimal results.

For use on adult dogs and puppies 12 weeks of age and older. Fits dogs with necks that measure up to 26 inches. Water-resistant design won't cause loss of effectiveness if your playful pup takes a stroll in the rain. Kills and repels fleas and ticks for 7 months. Can be worn simultaneously with your dog's regular collar. Fresh scented.

Best Sellers Rank: See Top 100 in Pet Supplies. Item Weight: 3.2 Ounces. Age Range Description: Puppy. Brand: Hartz. : B003NQWZRY. Manufacturer: Hartz. Date First Available: January 18, 2019. Item model number: 032700942670-4a. Package Dimensions: 5.16 x 4.06 x 3.5 inches; 3.2 Ounces.