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My dog still has fleas a week after K9 Advantix. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 9 months and 1 day old

It's been a week and a couple days since applying k9 advantix 2. Still has a couple of fleas. Around the chest/stomach area only. What should I do?

2 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on August 27th, 2016

If you're still seeing fleas after more than a week, I would be concerned that the K9 Advantix may not be working very well - it's usually one of the most effective topical medications for most dogs, but some will still have fleas. You can get an oral flea/tick medication like Nexgard or Bravecto from your vet that will be more effective, and you can give it right away - these are safe to administer along with K9 Advantix or other topicals if needed. If there are a lot of fleas in the environment, this could also be a reason that you are still seeing some - in this case, you may need to treat your house and yard for fleas or have an exterminator do this professionally to make sure they are gone.

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6Pet Parents found this answer helpful

Other Answers

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on

    I would recommend treating the home with a flea fogger found at your local Home depot or Lowe's. Also treating the yard is an option to help control the fleas in the environment. Max may just be going in an area that is overpopulated with fleas. If this still doesn't work, then I would consider switching to a different product to see if will work better. Some good options are Bravecto, Nexgard, and Comfortis. For now you can purchase a Capstar tablet to get rid of all the fleas on him within the next 24 hrs. This is not a preventative but helps control particularly high flea loads on pets and is used during times like this when it is not safe to reapply a topical preventative. You can safely re-apply most topical flea products every 2-4 if needed to re-dose early. You can also call an Advantix rep on the hotline number just to make sure their product is safe for every 2 week application.

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