Petco Text Logo
Petco Pet Logo

My dog's flea and tick treatment failed. Can I use another one?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | spayed | 11 years and 5 months old | 12 lbs

Sentry Pro flea and tick failed within a week of treatment. Can I give my dog a dose of another flea and tick treatment?

1 Answer

Most Helpful Answer

Image profile

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on June 3rd, 2017

Unfortunately, Sentry Pro flea and tick isn't a very good brand, and I would not recommend it. According to the package instructions, it's not safe to give another dose until 14 days after the initial application. I would wait another week, and apply a better flea treatment such as Revolution or Advantage. In the meantime, you can give Peaches Capstar. It's a one time pill that starts killing fleas in 30 minutes and it safe to give now. You will also have to disinfect the environment. Wash her bedding in hot soapy water, and vacuum the furniture and carpet surfaces. You can use a spray to kill fleas in the house, such as Indorex, or a flea bomb would work well to kill the fleas in the home. I hope this helps!

Vote icon

5Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored