Can Dogs Eat Plain Rice?
Plain cooked white rice is gentle on the stomach and great for upset tummies.
Details
White rice is a common veterinary recommendation for dogs with upset stomachs. It is easily digestible and helps firm up stools. Brown rice is also safe but has more fiber and may be harder to digest for sick dogs. Always serve plain — no butter, salt, or seasonings. The classic bland diet is boiled chicken breast with white rice.
Source: Veterinary Merck Manual