K9 Advantix Ii Dog Extra Large Blue 2-Pack

Monthly Topical Flea, Tick, and Mosquito Protection for Extra Large Dogs

K9 Advantix II is a vet-recommended monthly topical treatment that kills and repels fleas, ticks, and mosquitoes through contact - pests don't have to bite your dog for it to work. Formulated for extra large dogs, this 2-pack provides two months of comprehensive waterproof parasite protection with no prescription required. Easy to apply in seconds directly to your dog's skin, K9 Advantix II starts killing through contact within 12 hours and becomes waterproof after 24 hours. Unlike most competitors, it also kills and repels mosquitoes that may transmit heartworm disease and West Nile virus - making it one of the most complete monthly flea and tick treatments available.

Quick Product Snapshot

Why Pet Owners Choose K9 Advantix II

• Kills and repels through contact - fleas, ticks, and mosquitoes don't have to bite your dog for the treatment to work, reducing the risk of disease transmission before a bite occurs
• Starts killing within 12 hours of application - fast-acting protection from the first day of use
• Waterproof after 24 hours - maintains full effectiveness through bathing, swimming, and rain exposure
• Also kills and repels mosquitoes that may transmit heartworm disease and West Nile virus - a level of protection most flea and tick treatments do not provide
• No prescription required - available without a vet visit while still being vet-recommended
• Easy spot-on application in seconds - no pills, no collars, no complicated application steps
• 2-pack provides two full months of protection - reducing the frequency of reordering

How It Works

K9 Advantix II works through contact kill and repellency - the active ingredients spread across your dog's skin and coat after application, creating a protective barrier that kills and repels fleas, ticks, and mosquitoes without requiring a bite to activate. This contact-kill mechanism is a key differentiator from treatments that only work after a pest bites the dog. The formula begins working within 12 hours and provides 30 days of continuous protection per application. After 24 hours, the treatment becomes waterproof, maintaining effectiveness through water exposure.

Usage, Application, and Frequency Guidance

Part the fur between your dog's shoulder blades to expose the skin. Apply the entire contents of one applicator tube directly to the skin in one or two spots. Do not rub in - allow the product to spread naturally across the skin and coat. Apply once every 30 days for continuous protection. The treatment becomes waterproof after 24 hours - avoid bathing or water exposure during the first 24 hours after application. Safe for puppies 7 weeks of age and older weighing 4 lbs or greater. Do not use on cats - K9 Advantix II is toxic to cats.

Functional Use

K9 Advantix II functions as a monthly topical parasite control treatment providing contact kill and repellency against fleas, ticks, and mosquitoes. It is designed for continuous monthly use as a preventative treatment during flea and tick season and year-round in high-exposure environments. The mosquito repellency component provides additional protection against heartworm disease transmission and West Nile virus risk - extending its functional value beyond standard flea and tick treatments.

Safety, Usage, and Storage Guidance

• For use on dogs only - do not use on cats, as K9 Advantix II is toxic to cats
• Keep treated dogs away from cats until the application site is dry
• Not for use on puppies under 7 weeks of age or dogs weighing less than 4 lbs
• Avoid contact with eyes and mouth during application - wash hands thoroughly after use
• Keep out of reach of children
• Do not allow children to handle treated dogs until the application site is dry
• Store in a cool, dry place away from direct sunlight and heat
• Consult your veterinarian before use if your dog is pregnant, nursing, elderly, or on medication

Product Highlights

• Kills and repels fleas, ticks, and mosquitoes through contact
• Starts working within 12 hours of application
• Waterproof after 24 hours
• 30 days of protection per application
• Also repels mosquitoes that may transmit heartworm disease and West Nile virus
• No prescription required - vet recommended
• Easy spot-on application in seconds
• 2-pack - 2 months of protection for extra large dogs

Complete Monthly Protection for Extra Large Dogs

K9 Advantix II delivers one of the most comprehensive monthly flea and tick treatments available - killing and repelling fleas, ticks, and mosquitoes through contact before they bite. With fast 12-hour action, 30-day waterproof protection, and mosquito repellency that helps guard against heartworm disease and West Nile virus, this 2-pack gives extra large dog owners two full months of reliable, vet-recommended parasite protection with no prescription required.

Product Specifications