Yes, cats can safely eat brown rice in small amounts. It’s non-toxic and actually shows up as an ingredient in many commercial cat foods. That said, cats are obligate carnivores, so brown rice should only ever be an occasional addition to a meat-based diet, not a staple.
Why Brown Rice Is Safe but Not Essential
Brown rice provides fiber, B vitamins, and vitamin E. For a cat, those nutrients are nice bonuses but not necessities. Cats get almost everything they need from animal protein and fat. In the wild, their natural diet contains less than 3% carbohydrates. Commercial cat foods often push carbohydrate content much higher (up to 45% of calories) for cost and manufacturing reasons, which is already more than cats evolved to handle.
The good news is that cats digest rice starch remarkably well. Research published in the Journal of Animal Science found that rice had the highest starch digestibility of any carbohydrate source tested in cats, at 99%. So while cats produce very little of the enzyme that breaks down starch compared to dogs or humans, cooked rice doesn’t give their digestive system much trouble.
Brown Rice vs. White Rice for Cats
Brown rice is the more nutritious option. It retains its outer bran layer, which gives it more fiber, more B vitamins, and more vitamin E than white rice. Vets sometimes recommend brown rice specifically for cats dealing with diarrhea or constipation, since that extra fiber can help regulate digestion in both directions.
White rice is slightly easier to digest because it’s been stripped of that fibrous outer layer. If your cat has a very sensitive stomach, white rice may be gentler as a first introduction. But for a healthy cat, brown rice offers more nutritional value per bite.
How Much Brown Rice to Feed
The standard veterinary guideline is that treats and supplemental foods should not exceed 10% of your cat’s daily calorie intake. For an average indoor cat eating around 200 calories a day, that’s roughly 20 calories from rice, which works out to about one to two tablespoons of cooked brown rice.
Going beyond that 10% threshold regularly creates two problems. First, it displaces the protein-rich food your cat actually needs. Cats naturally try to balance their diet around 52% protein, 36% fat, and only about 12% carbohydrates. Filling them up on rice throws that balance off. Second, excess carbohydrates over time can contribute to insulin overproduction and increased body fat. Research has linked high-carbohydrate, low-protein diets to reduced insulin sensitivity in cats, and obesity in cats raises the risk of type 2 diabetes, kidney disease, and joint problems.
How to Prepare It
Cook brown rice thoroughly in plain water with no added ingredients. Serve it plain and at room temperature, mixed into your cat’s regular food or offered as a small side. A couple of important rules to follow:
- Never feed uncooked rice. Raw rice is extremely difficult for cats to digest and contains a natural compound called lectin that can cause vomiting and diarrhea in large amounts. If your cat eats uncooked rice and shows bloating or signs of pain lasting more than 24 hours, that warrants a vet visit.
- Skip all seasonings. Garlic and onions are genuinely dangerous for cats. Garlic is three to five times more toxic than onion, and cats are the most susceptible species. Even less than a teaspoon of cooked onion has caused toxicity in cats, leading to a type of anemia that can cause weakness, pale gums, and collapse days after ingestion. Salt, butter, soy sauce, and other common rice additions are also off the table.
- Introduce it slowly. Start with a teaspoon mixed into regular food and watch for any digestive upset over the next day or two before offering more.
When Brown Rice Can Help
Some cats benefit from a small amount of brown rice during bouts of mild digestive trouble. The fiber content can add bulk to loose stools or help move things along during constipation. If your vet has recommended a bland diet for a short period, brown rice mixed with plain boiled chicken is a common combination.
Brown rice also appears in commercial cat foods as a carbohydrate source, sometimes alongside ingredients like pea protein or corn gluten meal. Cats with food intolerances to certain animal proteins may be placed on diets that use rice-based formulas, since rice protein has been shown to be highly digestible and well-tolerated in clinical feeding trials with cats.
Cats That Should Avoid It
If your cat is overweight or has been diagnosed with diabetes, adding extra carbohydrates to their diet is counterproductive. Research shows that high-protein, low-carbohydrate diets help maintain normal insulin sensitivity in cats and support fat loss during weight management. Brown rice, while not harmful in small amounts, adds carbohydrate calories that these cats don’t need.
Cats with chronic gastrointestinal conditions should also get veterinary guidance before any dietary changes. While brown rice is gentle for most cats, the extra fiber can occasionally worsen symptoms in cats with specific sensitivities.