Why are wild mushrooms so risky for dogs?
Dogs eat mushrooms on walks because they smell interesting. While many are harmless, a single Amanita (death cap) mushroom can cause irreversible liver failure that is frequently fatal. Because most dogs cannot be identified by their owners, veterinarians treat unknown wild-mushroom ingestion as a possible emergency.
Why speed matters
Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.
Signs to watch for
- Onset can be 30 min–12 h depending on the species
- Vomiting, drooling, watery diarrhoea
- Lethargy, jaundice (liver damage)
- Tremors, seizures, coma in severe cases
What to do right now
- This is an emergency — call your vet immediately.
- Do not wait for symptoms; liver damage is often silent until severe.
- Collect a sample (put a mushroom in a paper bag) or photograph it for the vet to identify.
- Tell the vet when and where your dog ate it.
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.
The step-by-step response, from the first minute to the vet visit, is in our Mushroom Poisoning in Dogs emergency guide.