K9 Advantix II Large Dog Spot-On – Vet-Recommended Flea, Tick & Mosquito Protection (21–55 lbs) | 4-Mo Supply

One simple, veterinarian-approved solution for versatile pest protection

K9 Advantix II Large Dog is designed for dogs weighing 21–55 pounds, delivering comprehensive protection against five common pests: fleas, ticks, mosquitoes, biting flies, and lice. The formula both kills and repels fleas and mosquitoes on contact, helping reduce the chance of flea bites and easing daily dog life. With monthly use, it supports a steady preventive routine for many outdoor and indoor dogs alike.

Real-world performance meets convenience. Fleas are shown to be killed within 12 hours of application, and the product begins working on contact to interrupt the pest life cycle. The formula is fragrance-free, which can be gentler for dogs with sensitive noses, and becomes waterproof after 24 hours, so baths, rain, or swims don’t easily wash away protection. Best of all, no prescription is required, and you can choose a multi-pack option to suit your schedule.

Key benefits at a glance

• Kills fleas within 12 hours of application
• Repels and kills fleas, ticks, and mosquitoes on contact
• Waterproof after 24 hours, maintaining protection during play and grooming
• Fragrance-free formula suitable for indoor or outdoor dogs
• Easy spot-on administration; no pills or collars
• No prescription needed; available in 2-dose, 4-dose, and 6-dose packs

Using K9 Advantix II Large Dog can fit into a simple care routine. Dogs should be at least 7 weeks old and weigh 21–55 pounds to use this spot-on treatment. Monthly applications help keep pest protection consistent, aligning with daily routines, park visits, and family time. After applying, your dog can return to cuddles and active play with minimal disruption.

Real-world scenarios and care tips

• Park outings: enjoy outdoor time while reducing pest interruptions during peak seasons.
• Home grooming: support comfortable brushing and bathing without frequent pest concerns.
• Multi-dog households: convenient dosing options help you plan ahead for ongoing protection.

For best results, follow the product label for exact application steps and any potential side effects. If you have questions about suitability for your dog’s age, weight, or health status, consult your veterinarian.