Our dog put on weight when we started feeding her white rice. Which the vet wanted us to do occasionally throughout the day to make sure she never has an empty stomach. Due to her intestinal issues she gets a lot of buildup of bile and needs the rice to absorb it or she will throw up or have diarrhea.

She still eats her regular 3 meals a day of dog food but every few hours we give her a handful of white rice.