[theBCnut]

If your vet thinks it might be a food intolerance, then switching to chicken and rice might not be a good idea for very long. It might be an intolerance to chicken or rice.

You shouldn’t have issues switching from homecooked to raw, just start by giving him a little bit of the raw as a treat and make sure that it doesn’t trigger anything, then replace a meal with the raw, maybe a small meal at first, and increase the amount slowly until you find the right amount to feed him.