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What flea treatment is safe for my 7-week-old puppy turning 8 weeks?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 1 month and 9 days old | 4 lbs

What to use on a 7 week old puppy for fleas? Will be 8 weeks old in 3 days.

5 Answers

Most Helpful Answer

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Answered By Debi Matlack

Veterinary Technician

Published on May 10th, 2019

Revolution can be used on puppies 6 weeks of age and older, and there is no minimum weight requirement. At 7 weeks old, he can use Advantage II if the puppy weighs at least 3 pounds, or K9 Advantix II if he weighs at least 4 pounds. If you prefer a flea collar, the Seresto collar can be used on puppies at least 7 weeks of age or older. After he is eight weeks old, you can use Activyl, or Frontline Plus, as well as some of the newer oral flea control medications such as NexGard and Trifexis.

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17Pet Parents found this answer helpful

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    Answered By Kevin Sanada, DVM

    Veterinarian

    Published on December 14th, 2017

    There are a few different products that can be used, but I'm most familiar with Frontline and Revolution. They both have products made specifically for puppies this age. These are safe and effective products for fleas and ticks. Only use the product that is labeled specifically for puppies and make sure the pups fall within the weight range listed on the box. I hope that helps and all is well with Bentley.

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    5Pet Parents found this answer helpful

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    Answered By Elva Ma DVM

    Veterinarian

    Published on March 1st, 2018

    Hello, and thank you for your question! There are several veterinary-approved products that are safe for 8 week old puppies, such as Advantage Multi or Revolution. I would encourage you to visit your vet to prescribe the appropriate medication at the proper strength, and advise you of the proper duration of treatment. I hope this helps, and that Stormie feels better soon!

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    1Pet Parents found this answer helpful

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    Answered By Jessica Keay, DVM

    Veterinarian

    Published on August 7th, 2019

    I am sorry to hear about your concern for this pup! In tiny animals that may not be old or large enough to use flea medication we often use a bath in dawn dishsoap (being very careful to not get it in the eyes) to kill the fleas and then comb them out using a flea comb. There is also a product called Capstar which can be used in puppies older than 4 weeks that weigh 2 pounds or more. It will kill all the fleas on the pup within a few hours but only stays in the system for 24 hours so won't prevent new fleas.

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    1Pet Parents found this answer helpful

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on December 1st, 2016

    Poor pups. Unfortunately they are too young for a topical flea preventative like Revolution (youngest is 6 weeks of age). Your only option here is to give them a Capstar (NItenpyram, located at your local pet store and vet clinic), which is ok to use in puppies that are at least 4 weeks of old AND at least 2 lbs. Then you should bathe them in a Dawn dish detergent (strips the fleas and eggs off very well), just make sure none gets in the eyes, and dry them well after carefully with a blow dryer. And thereafter keep them away from the flea source. Flea fogger your home if you suspect they have bred in the carpet and are getting on the puppies that way. Flea fogger's are found at your local Home Depot or Lowe's. After this you only have 2 more weeks and you can get all puppies treated and protected with topical Revolution.

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    1Pet Parents found this answer helpful

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