Can dogs eat mushrooms? Plain store-bought mushrooms, cooked without butter, oil, garlic or onion, are generally safe in small amounts. Wild mushrooms are a different matter: a few species can cause liver failure or seizures, and even experts struggle to tell them apart. If your dog eats a mushroom from the yard or a trail, treat it as an emergency.
Moderation for grocery mushrooms, avoid wild ones. White button, cremini, portobello and shiitake are fine as an occasional plain, cooked extra. Never let a dog eat wild mushrooms, and skip mushrooms cooked in seasoned sauces, creamy dishes or on pizza. A medium white mushroom has only about 4 calories.
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Store-Bought vs Wild Mushrooms
The AKC and PetMD both draw the same line: only a small share of mushroom species are toxic, but those few are so dangerous that every wild mushroom should be treated as poisonous. Toxic types often grow alongside harmless ones, and some, like the death cap, even have a fishy smell that dogs find tempting.
| Mushroom | Verdict | Notes |
|---|---|---|
| White button, cremini, portobello | OK, plain and cooked | Low calorie; chop small |
| Shiitake, maitake, oyster | OK, plain and cooked | Introduce slowly |
| Raw grocery mushrooms | Better cooked | Harder to digest |
| Canned or pickled | Avoid | Salt, vinegar, seasonings |
| Any wild or yard mushroom | Emergency | Call a vet right away |
Dangerous Wild Mushrooms and Their Effects
| Toxin group (examples) | Main effect | Typical timing |
|---|---|---|
| Amatoxins (death cap, Galerina) | Liver failure; can be fatal | Signs after 6-24 hours, then a false “recovery” |
| Hallucinogenic or neurotoxic (fly agaric, panther cap) | Wobbliness, agitation, tremors, seizures | 30 minutes to a few hours |
| Muscarinic (Inocybe, Clitocybe) | Drooling, tearing, diarrhea, slow heart rate | Within hours |
| Gyromitrin (false morels) | Vomiting, seizures, liver damage | Several hours |
| GI irritants (many lawn species) | Vomiting and diarrhea | Within hours |
The deadliest cases can look mild at first, which is why vets don’t wait for symptoms.
My dog ate a mushroom in the yard. Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 now. Take photos of the mushroom from the top, side and underside, and collect a sample (and any vomit) in a paper bag or wrapped in a paper towel, not plastic. Note where it grew and when your dog ate it. Don’t induce vomiting unless a vet tells you to, and go to the clinic even if your dog seems fine.
Are Mushrooms Good for Dogs?
Grocery mushrooms are mostly water, so they add flavor and bulk with very few calories. They also bring small amounts of fiber, B vitamins such as riboflavin and niacin, potassium and selenium, plus antioxidants like ergothioneine. That makes a spoonful of plain cooked mushroom a reasonable low-calorie topper for a dog on a weight plan.
The benefits are modest, though, and your dog’s complete food already covers these nutrients. Mushrooms are an optional extra, not a health food your dog needs. Claims that mushrooms fight cancer or allergies in dogs come mostly from supplement marketing; talk to your vet before using any mushroom product for a medical reason.
How Many Mushrooms Can a Dog Eat?
Treat cooked grocery mushrooms as a small topper inside your dog’s treat allowance, the approach the WSAVA recommends for extras.
| Dog’s weight | Plain cooked, chopped | Approx. calories |
|---|---|---|
| 10 lb (4.5 kg) | 1 tablespoon | ~2 kcal |
| 25 lb (11 kg) | 2 tablespoons | ~4 kcal |
| 50 lb (23 kg) | ¼ cup | ~8 kcal |
| 75 lb (34 kg) | ⅓ cup | ~10 kcal |
| 100 lb (45 kg) | ½ cup | ~15 kcal |
Our estimates from USDA FoodData Central values for cooked white mushrooms. Calories are tiny; the limit is about digestion, so start smaller.
How to Serve Mushrooms Safely
- Rinse grocery mushrooms and slice or chop them.
- Steam, boil or dry-sauté with no butter, oil, salt, garlic or onion.
- Cool, then mix a small amount into the regular meal.
Leftovers like mushroom risotto, creamy soup, stroganoff or pizza usually contain onion or garlic, so they don’t qualify.
Puppies and Special Cases
- Puppies: curious mouths find yard mushrooms; walk the yard after rain and remove any you see.
- Sensitive stomach: skip mushrooms during an upset; see what to feed a dog with diarrhea.
- Medicinal mushroom supplements: ask your vet; quality and dosing vary widely.
Are store-bought mushrooms OK? Plain, cooked white button mushrooms are generally fine in small amounts, as long as there is no butter, garlic or onion.
My dog ate a wild mushroom in the yard. Treat it as an emergency. Call your vet or poison control right away and bag or photograph the mushroom. Some species are deadly, and signs can be delayed.
— Dr. Sarah Miller, DVM
Mushrooms for Dogs: Quick Serving Guide
✓ Do
- Choose store-bought white mushrooms
- Cook them plain with no oil
- Slice them small
- Check your yard for wild mushrooms
✕ Don't
- Let your dog eat wild mushrooms
- Add butter, garlic or onion
- Share mushroom sauces or pizza
- Wait for signs after a wild mushroom
Treat any wild mushroom as an emergency and call your vet or poison control.
Frequently Asked Questions
Can dogs eat mushrooms raw?
Raw grocery mushrooms aren’t toxic, but cooked ones are easier to digest. Never feed any raw wild mushroom.
Can dogs eat mushrooms on pizza?
Better not. Pizza mushrooms come with garlic, onion, salt and cheese. A single bite is rarely an emergency, but don’t make it a habit.
Can dogs eat mushrooms cooked in butter?
Plain is best. Butter adds fat that can upset the stomach, and these dishes often include garlic.
How do I keep mushrooms out of my yard?
Pick them as they appear, especially after rain, reduce shade and damp spots, and supervise your dog outdoors during mushroom season.
Wondering about other foods? Our A-Z guide to what dogs can eat sorts them into safe, moderation and avoid.
The Bottom Line
Can dogs eat mushrooms? Plain, cooked grocery mushrooms in small amounts, yes. Wild mushrooms, never, and a yard mushroom snack means calling a vet right away. See more answers in our Can Dogs Eat…? library, our list of foods that are toxic to dogs, or Start Here. This article is general information, not veterinary advice; see our Veterinary Disclaimer.
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.
- American Kennel Club (AKC) — Can dogs eat mushrooms
- PetMD — Can dogs eat mushrooms
- WSAVA — WSAVA guidetotreats dogs 251107
- USDA — USDA FoodData Central