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Is Frontline safe for my older dog with a tiny new puppy around?

Updated on September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | unneutered | 2 months and 3 days old | 1.8 lbs

Can I use frontline on my older dog with a new puppy in the home? The puppy is 8 weeks and bit only 1.8 pounds. My older dog is 9 and 20 pounds and needs his frontline.

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 4th, 2018

Yes, it is fine to use Frontline on your older dog with Kobi in the home. According to Frontline FAQs on their website, it is safe to use it on the puppy as long as he is eight weeks of age, but given that he is small in weight, to be safe, keep the older dog away from the puppy until the Frontline is completely dried, about 24 hours. You can safely use Frontline spray on the puppy, that is safe to use on puppies as young as two days of age. Good luck, I hope this helps!
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