Petco Text Logo
Petco Pet Logo
  • Two Easy Ways to Start Earning Rewards!

    rewards header
    Become a member today!
    Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
    Petco Pay LogoBecome a credit card member today!

    Earn 2X Pals Rewards points at Petco
    when you use Petco Pay!

    APPLY NOW
    Learn More About Petco Pay Benefits

Should I switch my overweight dog from Merrick to Royal Canin?

Updated on September 23rd, 2025

I am thinking about switching my dogs food to royal Cain. I have all 3 of my dogs on Merricks right now. One of my dogs is over weight

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on August 13th, 2018

Royal Canin is an excellent food, and I highly recommend it. I strongly urge the switch especially if the Merricks is grain free. There is a suspected link between grain free diets and an increase in dilated cardiomyopathy. The FDA is now investigating this link, and it looks like grain free diets are not good for dogs. Grains are good for dogs, and the grain free food is a fad. If you do switch food, you have to do it slowly to avoid GI upset. Start by mixing together 75% old food and 25% new food, and feed that for a couple of days. Then do 50% old and 50% new. Again feed for a couple of days, and then feed them 25% old and 75% old. After feeding that for another couple of days, you can feed them the new food only. In terms of your dog being overweight, feed according to the package instructions on the bag of food, no treats, and exercise daily. Best of luck, I hope this helps!
Vote Icon2Pet Parents found this answer helpful

Smart Picks for Smart Questions

Have A Vet Question?

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

Share

Styled arrow button