Do mosquitoes bite dogs? Yes, and K9 Advantix® II can help.

Mosquitoes aren’t just annoying to dogs – they can be dangerous, too. Learn how to prevent mosquito bites on dogs and protect your pet with K9 Advantix® II.

How K9 Advantix® II protects your dog from mosquitoes

  • An icon of a water drop within a shield
    Lasting protection

    K9 Advantix® II is waterproof after 24 hours and lasts for up to four weeks.

  • An icon of a flaking irritated skin
    Help prevent allergic reactions

    Mosquito bites on dogs can cause hives or swelling. K9 Advantix® II kills mosquitoes through contact, so they don’t have to bite your dog to die.

  • An icon of an applicator
    Easy-to-apply monthly topical

    Goes on in seconds. Apply drops directly on your dog's skin — no hard-to-swallow pills.

  • red flea, tick and mosquito icon
    More than mosquitoes

    K9 Advantix® II kills and repels fleas, ticks and mosquitoes too – and helps prevent transmission of diseases they may carry.

Mosquito diseases in dogs can be dangerous.

Can mosquitoes bite dogs? Yes, and if they are carrying diseases like heartworm, transmission can make your dog extremely sick and can be fatal*. Treating after the fact is expensive and it can be heartbreaking to watch your pup suffer. That’s why choosing a vet-recommended preventative and repellant like K9 Advantix® II is so important.

*K9 Advantix® II is not a substitute for a heartworm preventative.

Can I use bug spray on my dog?

Do not use bug sprays intended for humans on your dog. It can be extremely toxic. Trust the health and comfort of your pet to a brand with 20 years of protection: K9 Advantix® II. It’s vet-recommended, with no prescription needed, waterproof after 24 hours, and provides 30 days of protection.

Are mosquitoes getting worse?

In short, yes. The number and types of mosquitoes are increasing all over the country. Many can carry and transmit diseases. That’s why it’s important to choose a mosquito repellant for dogs that kills through contact so they don’t have to bite your dog for it to work.

See how K9 Advantix® II for dogs compares to the competition.

iconicon
KILLS MOSQUITOES
REPELS MOSQUITOES
KILLS FLEAS & TICKS
REPELS FLEAS
REPELS TICKS

Do not use  K9 Advantix® II on cats. †Based on label claims.

Tips for mosquito protection and prevention

Best way to protect your dog from mosquitoes is to prevent them in the first place. Mosquitoes breed in stagnant water, so be sure to refresh your dog’s bowl often especially if it is outdoors. They’re also more active at dusk, so try to walk your dog before early evening. Most importantly, use a mosquito repellant for dogs, such as K9 Advantix® II.

When is mosquito season?
They thrive in warmer weather, so in some areas it’s all year long.

Do not use K9 Advantix® II on cats.

K9 Advantix, Elanco and the diagonal bar logo are trademarks of Elanco or its affiliates. Frontline and NexGard are registered trademarks of Boehringer Ingelheim Animal Health. Bravecto is a registered trademark of Intervet, Inc. dba Merck Animal Health. PetArmor is a registered trademark of Velcera, Inc.

All other trademarks are the property of their respective owners.

PM-US-22-0737

May 2022

© 2025 Elanco or its affiliates.