Is Wild Mushrooms Toxic to Cats and Dogs?
Wild mushrooms are severely toxic to both cats and dogs — deadly species like the death cap look almost identical to harmless ones. Any backyard mushroom eaten is an emergency.
Potentially life-threatening — treat any exposure as an emergency.
Potentially life-threatening — treat any exposure as an emergency.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Wild Mushrooms?
Wild mushrooms are severely toxic to both cats and dogs — deadly species like the death cap look almost identical to harmless ones. Any backyard mushroom eaten is an emergency.
Also known as: mushrooms from yard, backyard mushrooms, lawn mushrooms, wild fungi, death cap, amanita, destroying angel, toadstools, mushroom poisoning.
Symptoms to Watch For
🐕 In Dogs
- Vomiting, drooling, and diarrhea within 15 minutes to several hours (depends on species)
- Wobbliness, weakness, tremors, or seizures (neurotoxic species)
- Yellowing of gums and eyes, lethargy — delayed liver failure (death caps, 6–24 hours)
- Collapse, kidney failure, and death without rapid treatment
🐈 In Cats
- Drooling, vomiting, and diarrhea
- Weakness, wobbliness, or seizures (neurotoxic species)
- Jaundice and lethargy hours later (liver-toxic species)
- Collapse, kidney or liver failure, and death without treatment
What to Do If Ingested
- Call a veterinarian or poison hotline immediately — treat every wild mushroom as toxic until identified.
- Collect a photo and, if possible, a sample of the mushroom (wrap in damp paper towel, not plastic) for identification.
- Remove any remaining pieces from the mouth.
- Do not induce vomiting unless a veterinarian instructs you to.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting. Have a cat? Run the Pet Poison Triage Wizard for cat-specific steps.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- ANY wild mushroom was eaten — species cannot be identified safely at home
- Vomiting, wobbliness, tremors, or seizures
- Lethargy or jaundice hours later — death cap liver failure is delayed
Frequently Asked Questions
Frequently Asked Questions
Are the mushrooms in my lawn dangerous? Most seem harmless.
Most lawn mushrooms are harmless, but a few — notably the death cap (Amanita phalloides) and destroying angel — are among the deadliest organisms on earth, and they can grow in the same lawn as harmless ones. There is no home rule of thumb ("if animals eat it", "if it peels", "if it is white") that separates them; even experienced foragers rely on spore prints and expert ID. Treat any eaten wild mushroom as an emergency and bring a sample.
Why is death cap poisoning delayed?
Death caps contain amatoxins that quietly destroy liver cells. Pets often vomit and seem to improve after 6 to 24 hours — the deceptive "honeymoon" phase — while liver failure builds. By the time jaundice and collapse appear, the damage is severe. This is exactly why "ate it and seems fine" is not reassurance: call immediately, because treatment started early is the difference between survival and fatal liver failure.
Are store-bought mushrooms and moldy mushrooms the same risk?
No — plain white button, cremini, and portobello mushrooms from the store are not toxic (a raw nibble may cause mild stomach upset, and a moldy mushroom can cause standard food-poisoning signs). The emergency applies to wild and unidentified mushrooms. If your dog got into the trash and ate moldy mushrooms, watch for vomiting and tremors from mycotoxins and call the vet if they appear.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-10-16