Dogs can eat certain types of mushrooms, specifically plain, cooked store- bought mushrooms like chestnut, button, shiitake, cremini, and portabella mushrooms. However, dogs should never eat wild mushrooms, as many wild varieties are highly toxic and can cause severe poisoning. Raw mushrooms are not recommended because they are harder for dogs to digest and may contain harmful substances. Cooking mushrooms plain, without oils, seasonings, garlic, or onions, reduces risks and makes them easier to digest. Mushrooms should only be given in moderation as a small treat and are not necessary in a dog's diet. If a dog eats an unknown wild mushroom, it is an emergency, and immediate veterinary care is needed, as some wild mushrooms can be fatal within 24 hours. Symptoms of mushroom poisoning in dogs can include vomiting, diarrhea, drooling, trembling, seizures, and unsteady walking. In summary, safe mushrooms for dogs are commercially sold edible varieties that are cooked and plain. Avoid wild mushrooms and any mushrooms cooked with harmful additives. Monitor your dog closely if they ingest mushrooms and seek emergency care if a toxic mushroom might have been eaten.