K9 Advantix II XL Dog Flea, Tick & Mosquito Treatment for Dogs Over 24.9 kg — 1-Month, Fast-Acting Waterproof

Designed for large dogs, this veterinarian-recommended spot-on delivers fast-acting parasite control in a single monthly application. The formula starts working quickly to reduce existing flea populations and provides ongoing protection outdoors and indoors when used as directed. It’s fragrance-free, becomes water-resistant after 24 hours, and comes in easy-to-use tubes so you can treat your dog without pills or collars.

How quickly does K9 Advantix II control fleas and other pests?

The topical solution begins eliminating fleas soon after application and is formulated to interrupt the flea lifecycle by killing adults before they can lay eggs. It also repels and kills ticks, mosquitoes, biting flies and lice, helping reduce repeated exposure when applied each month.

• Kills fleas on the dog within about 12 hours of first use
• Repels and kills common ticks and mosquitoes on contact
• Continues protection with monthly reapplication

Is K9 Advantix II safe and easy to apply to a large dog?

The treatment is formulated for dogs at least 7 weeks old and over 55 pounds, using a spot-on tube that you apply to the skin between the shoulder blades. When directions are followed, it’s a quick topical application with no tablets to swallow and minimal fuss for both owner and pet.

• Single-dose tube for one monthly application
• Apply directly to skin; avoid surface hair for best absorption
• Waterproof after 24 hours to allow normal activity after treatment

Can K9 Advantix II be used on dogs that spend time both indoors and outdoors?

Yes — the formula is intended for dogs that live indoors, outdoors, or both, and is effective as part of a regular monthly prevention routine. Consistent monthly use helps reduce the chance of re-infestation from outdoor exposure and contaminated indoor environments.

• Suitable for indoor and outdoor dogs when used monthly
• Available in multi-dose packs to make ongoing protection easier
• No prescription required for purchase and use

What practical benefits should owners expect after application?

After treatment, most dogs can return to normal activity quickly, and the product’s rapid action helps lower visible flea numbers and deter biting pests. Owners appreciate the simplicity of a monthly topical and the absence of strong fragrance.

• Fast-acting reduction in fleas and fewer insect bites
• Simple monthly routine—apply, dry for 24 hours, resume activities
• Fragrance-free formulation preferred by many pet owners

Who is this for: K9 Advantix II Extra Large Dog is intended for large-breed dogs weighing over 55 pounds and at least 7 weeks old, owned by people who want a monthly topical that targets multiple external parasites. It's a practical option for owners seeking veterinarian-recommended protection without prescriptions, and for households that prefer a quick, scent-free application rather than oral medications or collars. Always review the product label for full application instructions, safety directions, and potential side effects before use.

Ingredients

Imidacloprid, Permethrin, Pyriproxyfen