[anonymous]

“Ok so I’m definitely not gonna put him on the Royal Canin diet”.
That’s unfortunate.
Prescription food/therapeutic diet would be the best choice, at least till your dog is stable (imo)

Lentils are an excellent source of protein (btw)
Potatoes are a cheap starchy filler and many kibbles are loaded with them.

Good luck, do what you think is best. Personally, I would go by my veterinarian’s recommendations.