Can dogs eat oatmeal? Yes. Plain, cooked oatmeal made with water is safe for most dogs and is a gentle source of fiber and energy. It can be a nice topper for dogs that need a little extra fiber or a change of texture. Keep it plain: flavored instant packets, oatmeal cookies and oatmeal with raisins, chocolate or xylitol are the versions to skip.
Yes, plain and cooked. Rolled or steel-cut oats cooked in water, with nothing added, are fine in small amounts. Skip sugar, milk, butter, salt and flavored packets, and never share oatmeal raisin cookies, which contain toxic raisins.
Table of Contents
Which Oats Are Best for Dogs?
| Oat type | Verdict | Notes |
|---|---|---|
| Rolled oats, cooked | Best | Easy to cook, gentle |
| Steel-cut oats, cooked | Good | Chewier; cook until very soft |
| Plain quick oats | Good | Cook in water |
| Flavored instant packets | Avoid | Sugar, salt, sometimes raisins or xylitol |
| Raw oats | Small amounts | Harder to digest; soak or cook |
| Oat flour | Good in baked treats | See our oatmeal dog treats |
What's in Oatmeal?
Oats bring soluble fiber (beta-glucan), some protein, B vitamins and minerals like manganese and iron. Per cup cooked with water, using USDA FoodData Central values:
| Per 1 cup cooked (with water) | Amount |
|---|---|
| Calories | ~166 kcal |
| Protein | ~6 g |
| Fiber | ~4 g |
| Fat | ~3.6 g |
Approximate USDA values. Cooking with milk adds calories and lactose.
Oats are naturally gluten-free, though some are processed alongside wheat. True grain allergies in dogs are less common than protein allergies.
How Much Oatmeal Can a Dog Eat?
| Dog's weight | Plain cooked oatmeal | Rough calories |
|---|---|---|
| Under 15 lb | 1 tablespoon | ~10 kcal |
| 15 to 40 lb | 2 to 3 tablespoons | ~20 to 30 kcal |
| 40 to 70 lb | ¼ cup | ~40 kcal |
| Over 70 lb | ⅓ cup | ~55 kcal |
Our estimates for healthy adults. Treats and toppers should stay under about 10% of daily calories, a guideline from WSAVA.
A few times a week is plenty. If you add oatmeal often, reduce your dog's regular food a little to keep calories steady.
How to Make Oatmeal for Dogs
- Cook rolled oats in water (about 1 part oats to 2 parts water) until soft.
- Let it cool completely.
- Add a spoonful of plain pumpkin or a few blueberries if you like.
- Mix a small amount into regular food.
Skip sugar, honey, brown sugar, syrup, butter, salt and milk. A tiny pinch of cinnamon is fine for most dogs, but it isn't needed.
Oatmeal Foods to Keep Away
Oatmeal raisin cookies are a real risk. Raisins can cause kidney failure in dogs; see our raisins guide. Also skip oatmeal cookies with chocolate chips, oatmeal cream pies and flavored packets. Some “sugar-free” oatmeal or toppings contain xylitol, which the FDA warns is dangerous for dogs. Call your vet if your dog ate any of these. See our veterinary disclaimer.
Oatmeal for Itchy Skin and Upset Stomachs
- Oatmeal baths: colloidal oatmeal shampoos can soothe dry, itchy skin, but they don't treat the cause. See dog itchy skin.
- Upset stomach: plain oats are gentle, but most vets suggest boiled chicken and white rice for short-term bland diets. See dog upset stomach.
Simple Oat Ideas for Dogs
- Oat and pumpkin topper: 2 tablespoons cooked oats mixed with 1 tablespoon plain pumpkin.
- Frozen oat bites: cooked oats blended with plain yogurt and a few blueberries, frozen in a mini mold.
- Baked biscuits: oat flour, an egg and a little xylitol-free peanut butter; see our oatmeal dog treats recipe.
- Breakfast share: if you make plain oatmeal for yourself, set a spoonful aside before adding sugar, fruit or milk.
All of these count toward the daily treat budget, so trim regular meals slightly on days you add oats.
Is oatmeal good for dogs? Plain cooked oatmeal is a fine extra for most dogs. It adds fiber, but it shouldn't replace balanced food.
What's the most dangerous oatmeal mistake? Sharing oatmeal raisin cookies or flavored packets. Raisins can cause kidney failure, and some products contain xylitol.
— Dr. Sarah Miller, DVM
Oatmeal for Dogs: Quick Serving Guide
✓ Do
- Cook plain oats in water
- Let it cool before serving
- Add pumpkin or blueberries
- Keep portions small
✕ Don't
- Add sugar, milk or butter
- Use flavored instant packets
- Share oatmeal raisin cookies
- Use products with xylitol
Dogs with diabetes or a sensitive stomach should get a vet OK first.
Frequently Asked Questions
Can dogs eat oatmeal every day?
A small daily spoonful is fine for many dogs if it fits the calorie budget.
Can dogs eat oatmeal with milk?
It's better with water. Milk adds lactose, which upsets many dogs.
Can dogs eat oatmeal with peanut butter?
Yes, a little plain, xylitol-free peanut butter is fine.
Can dogs eat oatmeal cookies?
It's best not to. They're sugary, and oatmeal raisin cookies are toxic.
Is oatmeal good for dogs with diarrhea?
It's gentle, but call your vet if diarrhea lasts more than a day or two.
The Bottom Line
Can dogs eat oatmeal? Yes, plain cooked oats made with water are a gentle, fiber-rich extra in small amounts. Skip sugar, milk and flavored packets, and keep oatmeal raisin cookies far away. More answers in our Can Dogs Eat…? library.
References & Sources
Written by CPD Nutrition Desk using the sources below. We are not affiliated with these organizations, and this guide is not a substitute for advice from your veterinarian.
- USDA — USDA FoodData Central
- WSAVA — WSAVA guidetotreats dogs 251107
- U.S. Food and Drug Administration — Paws xylitol its dangerous dogs