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What's safe for fleas on a tiny 2-month-old puppy under 1 pound?

Updated on September 23rd, 2025

Pet's info: Dog | Chihuahua | Male | unneutered | 2 months and 11 days old | 1lb

I have a 2 month old chihuahua puppy I just adopted I don't know how much he weighs but he's maybe less than 1 pound he has fleas but I don't know what to use on him that won't harm him

1 Answer

Most Helpful Answer

Lauren Jones VMD

Answered By Lauren Jones VMD

Veterinarian

Published on May 1st, 2020

Treating fleas in such tiny pups is definitely a challenge! You can try bathing Dallas in original blue Dawn dish soap to initially kill off any adult fleas. Just be sure to rinse and dry him well so that he doesn't get too cold. While it's not my favorite flea preventive in terms of how well it works, Frontline spray is the only over the counter product available for such tiny pups. Given his young age, I assume that Dallas will be going to his vet in the coming days or weeks for booster vaccinations. During this appointment, your vet will be able to weigh him and discuss the flea treatment and preventive options based on his body weight. I hope this helps and that all goes well!
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