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How to transition dog food after colitis without stomach upset?

Updated On September 23rd, 2025

Pet's info: Dog | French Bulldog | Male | unneutered | 2 years and 10 months old | 23 lbs

Lou has been on royal canin gastro intestinal low fat wet food for about 2 weeks bc he had stress colitis the vet said. His fecal and giardia were negative. He’s been doing great on that food but transitioning him over has been tough. He either won’t eat it w his food mixed in or he struggles to poop and it’s runnier. I planned on trying to transition to Purina pro plan this week hoping it will be better.

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1 Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on December 2nd, 2018

If you intend to transition to a new food, do it this way: I would fast Lou for 24 hours and then put him on bland food for two days, such as boiled white rice and boiled white boneless chicken meat, fed in small quantities over several feeds and then transition back to regular food slowly over a few days. This should work.

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