Fight the misery of biting fleas with Advantage® II. A monthly topical flea prevention and treatment for dogs and puppies (at least 7 weeks old and 3 lbs. or more) that kills fleas through contact so they don’t have to bite your pet to die.

Advantage® II flea treatment for dogs goes on in seconds, starts killing fleas within 12 hours and is waterproof after 24 hours. Simply reapply every 30 days.

Kills and prevents
Kills and prevents fleas, flea eggs, flea larvae and chewing lice.

Easy to apply
Easier than a flea collar. Goes on in seconds. Apply directly to dog’s skin — no hard-to-swallow pills.

30-day continuous protection
Apply Advantage® II monthly. Starts killing fleas on your dog in 12 hours, waterproof after 24 hours.

No prescription needed
Available over the counter whenever you need it.

PetLock® Max for Dogs uses the same active ingredients as Bayer K9 Advantix II®: for Dogs, but sells for a fraction of the cost. PetLock® Max is fast-acting, long-lasting, waterproof, and easy to use. Apply monthly.

PetLock® Max for Dogs uses the same active ingredients as Bayer K9 Advantix II®: for Dogs, but sells for a fraction of the cost. PetLock® Max is fast-acting, long-lasting, waterproof, and easy to use. Apply monthly.

PetLock® Max for Dogs uses the same active ingredients as Bayer K9 Advantix II®: for Dogs, but sells for a fraction of the cost. PetLock® Max is fast-acting, long-lasting, waterproof, and easy to use. Apply monthly.