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What flea & tick medicine is safe for my 9-week-old puppy under 5 lbs?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 2 months and 4 days old | 4 lbs

Can I administer Pet Armor Plus for small breeds 5-22lbs on my 9 week old paparanian when he is not quite 5lbs maybe half the dose? Or what would be safest for my sweet baby?

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1 Answer

Most Helpful Answer

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Answered By Anna M., DVM

Veterinarian

Published on March 24th, 2019

Hello, and thanks for using Petco Pet Education Center, formerly Petcoach. What a cutie!! I recommend sticking with a product that’s on label for both Nash Ford’s size and age. I really like Nexgard, which is labeled for 4 lbs and up, and as young as 8 weeks. It should be available from most vets. Hope this helps! It’s great that you’re taking such good care of your sweet pup!

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