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Is it safe to use my cat's Hartz flea and tick topical on my dog?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | unneutered | 4 years and 1 month old | 68 lbs

I have Hartz ultraguard topical flea and tick prevention for cats can I use it on my Dogg

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on August 17th, 2018

No, this would not be recommended. Given the weight difference, you would likely need multiple doses which could easily lead to overdose. Use a product specifically for dogs. Talk with your veterinarian about the safest, most effective options.

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