Can dogs eat mushrooms?
Safe in moderationPlain, cooked, unseasoned store-bought mushrooms like white button or cremini are safe for dogs in small amounts, but wild mushrooms can be toxic and are a poisoning emergency.
Reviewed by the Webvet Veterinarian Team · Last reviewed June 26, 2026
Can Dogs Eat Mushrooms?
Plain, cooked, unseasoned store-bought mushrooms such as white button, cremini, and portobello are safe for most dogs in small amounts, but wild mushrooms are a completely different story and can be poisonous enough to become a life-threatening emergency. With mushrooms, the type is everything. A grocery-store mushroom grown for people is not toxic to dogs, while a single wild mushroom picked up on a walk or sprouting in your backyard can cause vomiting, liver failure, seizures, or death. Because dogs cannot tell edible and deadly mushrooms apart, and neither can most people, the safest rule is to only ever offer mushrooms you bought from a store and to keep your dog away from every mushroom growing outdoors.
- 1Plain, cooked, store-bought mushrooms are non-toxic and safe as an occasional small treat.
- 2Wild mushrooms can be deadly and are always a poison emergency, so never let your dog eat one.
- 3Skip garlic, onion, butter, oil, and salt, which are common in mushroom dishes and harmful to dogs.
- 4Mushrooms are not a needed part of a dog's diet and offer only minor nutrition.
- 5If your dog eats a wild or unknown mushroom, call your vet or a pet poison hotline right away.
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Are mushrooms safe for dogs?
The mushrooms sold in grocery stores for human cooking are not toxic to dogs. Varieties like white button, cremini, portobello, shiitake, and oyster mushrooms are all considered safe for a dog to eat when they are plain and cooked. Veterinary sources agree that a dog who nibbles a piece of a plain store-bought mushroom is not in danger. That said, mushrooms are not a natural or necessary food for dogs, and they provide only modest nutrition, so there is no strong reason to make them a regular part of your dog's meals. Think of them as an occasional novelty rather than a health food.
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The real caution comes from how mushrooms usually reach a dog's mouth. Most mushroom poisoning cases do not involve grocery-store produce at all. They happen when a dog eats a wild mushroom in the yard or on a walk, or when a dog is fed a cooked human dish where the mushrooms are drowning in butter, oil, salt, garlic, or onion. Garlic and onion belong to the allium family and are toxic to dogs on their own, so a garlic-and-mushroom saute can be harmful even though the mushroom itself is fine. When people say mushrooms are dangerous for dogs, this is almost always what they mean.
Store-bought versus wild mushrooms
The single most important distinction with mushrooms and dogs is where the mushroom came from. Cultivated mushrooms sold in supermarkets are grown under controlled conditions and are the same edible species people eat every day. Wild mushrooms are a wild card. There are thousands of species, many of them look nearly identical, and the safe ones and the deadly ones can grow side by side in the same patch of grass. Even experienced foragers use spore prints and careful examination to identify species, which is not something a curious dog sniffing the lawn is going to do.
On the safe side, the store-bought mushrooms a dog can have plain and cooked are the common culinary types: white button, cremini, portobello, shiitake, and oyster mushrooms. These are the same species people cook with, grown under controlled conditions, and none of them are toxic to dogs when served plain. If a mushroom came from the produce section and has nothing added, it falls into this safe group.
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Wild mushrooms are the danger, and a handful of species are why any wild mushroom must be treated as an emergency. The deadliest are the Amanita species, which include the death cap (Amanita phalloides) and the destroying angel, and their amanitin toxins can shut down the liver. False morels and small brown lawn mushrooms in the Inocybe and Clitocybe groups are also highly toxic. Between them these species can cause liver failure, seizures, and death, and they can grow in the same yards and trails a dog walks through. Because they are nearly impossible to identify by sight, the safe rule stands: store-bought plain mushrooms are ok in moderation, wild mushrooms are never ok, and any wild ingestion means calling poison control right away.
Different toxic mushrooms attack the body in different ways. Some cause severe vomiting and diarrhea within a few hours. Amanita species contain amanitin toxins that can produce an early bout of stomach upset, then a false recovery where the dog seems better, followed a day or two later by devastating liver failure. Others trigger neurological signs such as tremors, drooling, stumbling, or seizures. Because the danger and the timeline vary so much by species, veterinarians treat any wild mushroom ingestion as an emergency until proven otherwise. Damp, warm weather makes mushrooms pop up quickly in yards, so it pays to walk your property and clear them before your dog does.
Do mushrooms have any health benefits for dogs?
Edible mushrooms do carry some nutrition. They are low in calories, at roughly 22 calories per 100 grams, and they contain B vitamins such as riboflavin, niacin, and pantothenic acid, along with minerals like selenium, copper, and potassium, plus a little fiber. Certain mushrooms are also one of the few plant foods that provide some vitamin D. On paper that sounds useful, but the amounts a dog would get from a safe, treat-sized portion are small, and a complete commercial dog food already supplies these nutrients in the right balance.
You may also see functional mushroom supplements marketed for dogs, using species like reishi, turkey tail, or maitake for immune support. These are a separate topic from feeding culinary mushrooms and should only be given under the guidance of your veterinarian, who can advise on whether a product is appropriate and at what dose. For the everyday question of whether to share a bite of the mushrooms on your dinner plate, the honest answer is that mushrooms are fine in moderation but nutritionally optional. Your dog is not missing out by skipping them.
How much mushroom can a dog have?
Because store-bought mushrooms are a treat and not a staple, keep the portion small and follow the ten percent rule, which says treats and extras should make up no more than ten percent of your dog's daily calories. A few small pieces of plain cooked mushroom are plenty for most dogs, and a small dog should get noticeably less than a large one. Introduce mushrooms the way you would any new food, starting with a tiny amount and watching for any digestive upset over the next day before offering more. The table below gives a rough guide by body weight.
| Dog size | Plain cooked mushroom as an occasional treat |
|---|---|
| Small (under 20 lb) | 1 to 2 small pieces |
| Medium (20 to 50 lb) | 2 to 3 small pieces |
| Large (over 50 lb) | A few small pieces |
| Any wild mushroom | None, ever, it is an emergency |
How to prepare mushrooms for your dog
If you want to share mushrooms, preparation matters as much as the type. Start with plain store-bought mushrooms and wash them well to remove any grit. Cook them without any oil, butter, salt, or seasoning, since fat and salt upset a dog's stomach and additives like garlic and onion are toxic. Cooking matters because raw mushrooms have tough cell walls that dogs digest poorly, so plain steamed, boiled, or dry-sauteed mushrooms are gentler on the gut than raw ones. Let them cool, then chop them into small, soft pieces that are easy to chew and swallow.
Serve mushrooms on their own or mixed plainly into your dog's regular food, not as part of a rich human recipe. That means no creamy mushroom sauce, no mushroom soup, and no pizza toppings, all of which tend to carry salt, dairy, onion, garlic, and fat that are bad for dogs. Keep it simple and small, and treat mushrooms as a once-in-a-while extra rather than a daily addition.
Risks and signs to watch for
Even with safe store-bought mushrooms, too much can cause gas, an upset stomach, or loose stool, especially if they are raw or given in large amounts. The bigger risks are the ones already covered: wild mushrooms, which can be fatal, and seasoned mushroom dishes, which hide toxic ingredients. Some dogs also simply do not care for the earthy taste and texture of mushrooms, and there is no reason to push a food your dog dislikes when it offers so little benefit.
Learn the warning signs of mushroom poisoning so you can act fast if your dog gets into a wild mushroom. Common signs include vomiting, diarrhea, excessive drooling, weakness or lethargy, an unsteady or wobbly walk, tremors, seizures, and yellowing of the gums or eyes, which points to liver trouble. Signs can appear within minutes or be delayed for many hours depending on the species, and a period of apparent recovery does not mean your dog is safe. If you see any of these signs, or you know your dog swallowed a wild mushroom, get to a vet immediately.
What to do if your dog eats a wild mushroom
Treat it as an emergency and do not wait for symptoms to start. Call your veterinarian, the nearest emergency animal hospital, the Pet Poison Helpline at 855-764-7661, or the ASPCA Animal Poison Control Center at 888-426-4435 right away. If you can do it safely, collect a piece of the mushroom or take a clear photo, including the cap, stem, and underside, and place a sample in a paper bag rather than plastic so it does not degrade. This helps the veterinary team identify the species and choose the right treatment. Do not try to make your dog vomit at home unless a veterinary professional tells you to, since the wrong move can make things worse.
Safe alternatives to mushrooms
If you want a crunchy, low-calorie vegetable treat that is genuinely good for your dog and carries none of the mushroom guesswork, there are better options. Carrots are safe raw or cooked, help scrape plaque off the teeth, and are rich in fiber and beta-carotene. Green beans are another vet-friendly favorite, low in calories and filling, which makes them a great choice for dogs watching their weight. Both give you the fun of sharing a veggie without any of the risk that comes with mushrooms, and most dogs love the crunch.
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Frequently Asked Questions
Are cooked mushrooms ok for dogs to eat?
Yes, plain cooked store-bought mushrooms are fine for dogs in small amounts. Cooking makes them easier to digest than raw. Just make sure they are cooked without oil, butter, salt, garlic, or onion, since those additions can upset the stomach or be toxic.
How much mushroom is toxic to a dog?
There is no safe amount of a toxic wild mushroom, and even a single small one can poison a dog depending on the species. Store-bought mushrooms are not toxic, but eating a large quantity can still cause stomach upset. When in doubt about a wild mushroom, treat any amount as an emergency.
What are the signs of mushroom poisoning in dogs?
Watch for vomiting, diarrhea, heavy drooling, weakness, a wobbly walk, tremors, seizures, and yellowing of the gums or eyes. Signs may show up quickly or be delayed for hours, and a false recovery can occur before serious liver damage sets in. Any of these signs after possible mushroom exposure needs immediate veterinary care.
Can dogs eat raw mushrooms?
Raw store-bought mushrooms are not toxic, but their tough cell walls are hard for dogs to digest and can cause gas or loose stool. Plain cooked mushrooms are gentler on the stomach, so cooking is the better choice if you want to share.
Can dogs eat mushrooms on pizza or in soup?
No, it is best to avoid them. The mushrooms themselves may be safe, but pizza and mushroom soup are loaded with salt, fat, cheese, and often garlic and onion, which are bad or outright toxic for dogs. Stick to plain cooked mushrooms served on their own.
Sources
Reviewed by the Webvet Veterinarian Team
General guidance based on credible veterinary sources — not a diagnosis or a substitute for your veterinarian. If your pet ate something toxic or is unwell, contact your vet or a pet poison line right away.