✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last reviewed: 2026-04
Can dogs eat mushrooms?
The full picture
Mushrooms are a high-impression query because the answer is genuinely complicated. The supermarket mushrooms in your fridge are one category. The mushrooms growing in your lawn after rain are another category entirely.
Supermarket mushrooms that are safe in small amounts (plain cooked): • Button mushrooms — white, small. Safe cooked plain. • Chestnut mushrooms — brown, same species as button. Safe cooked plain. • Portobello / large flat mushrooms — fully mature button mushrooms. Safe cooked plain. • Oyster mushrooms — safe cooked plain. • Shiitake — safe in small cooked amounts but can cause skin reactions in sensitive dogs.
All cultivated mushrooms should be cooked, not raw. Plain cooked — no butter, oil, garlic, onion, or seasoning.
Wild and garden mushrooms — never. The UK has many toxic wild species: Death Cap (Amanita phalloides — fatal), Destroying Angel (equally deadly), Fly Agaric, and Inocybe/Clitocybe species.
If your dog has eaten any wild or unknown mushroom — including ones growing in your own garden — call the Animal PoisonLine immediately.
If your dog ate more than a safe amount
- If the mushroom is from a shop and was plain: likely fine — watch for stomach upset
- If a wild mushroom was eaten: this is a genuine emergency. Call your vet immediately
- Take a photo of the mushroom (or any remaining piece) — identification is critical for treatment
- If safe to do so, bring a sample — put it in a paper bag (not plastic) to preserve it
- Do NOT wait for symptoms. Some toxic mushrooms cause damage hours before signs appear
- Call the Animal PoisonLine on 01202 509000 if your vet is closed
Information to have ready when you call:
- What the mushroom looked like (photo ideal)
- Where it was eaten (garden, woodland, lawn, park)
- How much was eaten
- Time of ingestion
- Any symptoms already showing
Risks to watch for
- Liver failure from toxic wild species (can be fatal)
- Seizures, tremors, hallucinations
- Severe vomiting and diarrhoea
- Kidney damage from some species
- Aspiration risks during vomiting
Potential benefits
- Some vitamins from shop-bought types, but not worth intentional feeding
What to watch for — and when
[{'when': '15 minutes – 2 hours', 'signs': 'Early signs from some species: drooling, vomiting, weakness'}, {'when': '2–6 hours', 'signs': 'Tremors, seizures, incoordination (some species)'}, {'when': '6–24 hours', 'signs': 'Apparent recovery — but liver damage may be progressing silently'}, {'when': '24–72 hours', 'signs': 'Liver failure signs: jaundice, severe vomiting, collapse (death cap especially)'}]
Hidden sources to check
- Garlic mushrooms (double trouble with garlic)
- Mushroom sauces and stroganoff
- Mushroom soup (often with onion too)
- Pizza toppings
- Wild mushrooms in garden lawns and woodland walks
Breed-specific notes
- Small dogs reach toxic doses on very small amounts.
- Flat-faced breeds: never induce vomiting at home.
Safe portion size
A small piece of plain cooked supermarket mushroom occasionally. None if the source is unknown.
Safer alternatives
- Cooked carrots
- Green beans
- Plain cooked chicken
Common questions
Can dogs eat button mushrooms?
Can dogs eat chestnut mushrooms?
Can dogs eat raw mushrooms?
Can dogs eat portobello mushrooms?
My dog ate a wild mushroom — what should I do?
What about mushroom supplements for dogs?
My dog ate a mushroom from the lawn — is it dangerous?
How we keep this site free. Some links on this page take you to Amazon. We earn a small commission if you buy something — at no extra cost to you. Editorial first, products second. Full disclosure.