The Hartz flea collar is an excellent product that will destroy and repel flea invasions. It is water resistant so you won't have to replace it if you give Fido a bath. It will kill and prevent flea eggs for up to seven months. This will give your dog almost a year-long amount of protection.

Are Hartz flea collars effective?

Hartz flea collars with "plus" in the name are effective at stopping the flea lifecycle at any point. Other products, such as the Hartz® UltraGuard® Flea & Tick Collar for Cats and Kittens, target adult insects.

How long does it take for Hartz flea collar to work?

How long does it take for Hartz UltraGuard® to kill fleas? Hartz UltraGuard® Topicals start killing fleas within 15 minutes after application and continues to kill for 30 days.