Can dogs eat mushrooms?
If your dog has just eaten mushrooms
Do this now
- 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
What your vet will want to know
Have this information 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
The full picture
The mushroom question has two very different answers. Common UK supermarket mushrooms (white button, chestnut, portobello, oyster) are not toxic to dogs, and plain cooked mushrooms in small amounts are safe. The real danger is wild mushrooms. The UK has multiple toxic species — including the death cap and fly agaric — that can cause liver failure, seizures, and death in dogs. Identifying mushrooms is a specialist skill, so the safe rule is: any mushroom your dog finds on a walk is potentially poisonous. Autumn is peak season for wild mushroom poisonings in the UK — keep dogs away from woodland and garden mushrooms, especially after rain.
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
Symptom timeline
Symptoms typically progress in stages. Knowing what to expect helps you act fast:
- 15 minutes – 2 hours Early signs from some species: drooling, vomiting, weakness
- 2–6 hours Tremors, seizures, incoordination (some species)
- 6–24 hours Apparent recovery — but liver damage may be progressing silently
- 24–72 hours Liver failure signs: jaundice, severe vomiting, collapse (death cap especially)
Breed-specific warnings
- 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
My dog ate a mushroom in the garden — what should I do?
Call your vet immediately, even if your dog seems fine. Take a photo of the mushroom and bring a sample if you can. Don't wait to see if symptoms develop — some toxic UK mushrooms cause apparent 'recovery' before severe liver damage appears days later.
Are all wild mushrooms dangerous to dogs?
Many aren't, but a significant number are, and identification is very difficult even for experts. The safe assumption is that any unknown wild mushroom is potentially toxic. Don't try to identify it yourself.
Can I share mushrooms from my dinner?
Plain cooked supermarket mushrooms in small amounts are safe, but most dinner mushrooms are cooked with butter, garlic, onion, or oil — all of which are issues. Skip it, or only share truly plain ones.
Unexpected vet bills can run into thousands
One emergency visit for food poisoning can cost £500–£5,000+. Compare UK pet insurance in 60 seconds.
Compare pet insurance →Checked against UK veterinary guidance — see our editorial standards and source list. If your dog has eaten something and you need urgent advice, call a vet or the Animal PoisonLine on 01202 509000.