Can Cats Eat Mushrooms? Short answer: Plain, cooked store-bought mushrooms (white button, cremini, portobello) are safe for cats in very small amounts. Wild mushrooms are TOXIC and can be fatal.
There is a massive difference between cultivated mushrooms from the grocery store and wild mushrooms. Store-bought mushrooms (non-toxic varieties) are generally safe for cats. Wild mushrooms are extremely dangerous — many species contain toxins that cause liver failure, kidney failure, seizures, and death.
I’m Dr. Allona Jackson, DVM. In this guide, I’ll explain the critical distinction between safe store-bought mushrooms and toxic wild mushrooms, symptoms of mushroom poisoning, and exactly what to do in an emergency.
For a complete list of safe and toxic foods, see our Cat Food Safety Guide — your pillar resource for everything your cat can and cannot eat.
Quick Answer — Store-Bought = Safe (Tiny Amounts), Wild = TOXIC
| Rule | Detail |
|---|---|
| ✅ Plain, cooked store-bought mushrooms (white button, cremini, portobello, shiitake) | Safe in tiny amounts — no nutritional value |
| ❌ Wild mushrooms (any) | TOXIC — can be fatal — never feed |
| ❌ Mushrooms from yard / garden | TOXIC — cannot reliably identify safe species |
| ❌ Raw store-bought mushrooms | Hard to digest — cook first |
| ❌ Canned mushrooms | Often high sodium — check label |
| ❌ Mushrooms cooked with onion/garlic | Onion/garlic toxic |
| ❌ Fried mushrooms | High fat → pancreatitis |
| ⚠️ No nutritional value | Mushrooms offer cats nothing they need |
| 📏 Portion size (store-bought) | 1 small piece (size of a pea), 1-2 times per week maximum |
| 🍽️ Preparation | Cook plain (no oil, no salt, no seasonings). Cut into small pieces. |
| 🚨 Emergency (wild mushrooms) | If cat eats any wild mushroom → Emergency vet immediately — do NOT wait for symptoms |
The Critical Distinction — Store-Bought vs. Wild Mushrooms
This is the most important distinction in this article.
| Type | Safety | Why |
|---|---|---|
| Store-bought mushrooms (white button, cremini, portobello, shiitake, oyster) | Generally safe in small amounts | Cultivated, non-toxic varieties. No toxic compounds. |
| Wild mushrooms | TOXIC — potentially fatal | Many species contain amatoxins, gyromitrins, muscarine, ibotenic acid, psilocybin. Cannot reliably identify safe vs toxic by sight. |
Dr. Jackson’s note: “Never let your cat eat wild mushrooms. Not even one bite. Even mushroom experts can misidentify species. The toxins in wild mushrooms cause liver failure, kidney failure, seizures, and death within hours to days. This is a medical emergency.”
Safe Store-Bought Mushrooms
Plain, cooked store-bought mushrooms from the grocery store are generally safe for cats in very small amounts.
| Mushroom type | Safe for cats? | Notes |
|---|---|---|
| White button mushrooms | ✅ Yes (tiny amounts) | Most common. Cook plain. |
| Cremini / baby bella | ✅ Yes (tiny amounts) | Same species as white button (Agaricus bisporus). |
| Portobello | ✅ Yes (tiny amounts) | Same species — mature cremini. |
| Shiitake | ✅ Yes (tiny amounts) | Cook thoroughly. No nutritional value. |
| Oyster mushrooms | ✅ Yes (tiny amounts) | Cook thoroughly. |
| Enoki | ✅ Yes (tiny amounts) | Cook thoroughly. |
| Maitake (hen of the woods) | ✅ Yes (tiny amounts) | Cook thoroughly. |
All store-bought mushrooms must be:
- Cooked (never raw — hard to digest)
- Plain (no oil, no salt, no butter, no seasonings)
- Cut into small, pea-sized pieces
Toxic Wild Mushrooms — Never Feed
Never feed any wild mushroom to cats. Many species are deadly even in small amounts.
| Toxic mushroom species | Toxin | Symptoms | Mortality |
|---|---|---|---|
| Amanita phalloides (Death Cap) | Amatoxins | Liver failure symptoms after 6-12 hours; death in 2-7 days | Very high |
| Amanita bisporigera (Destroying Angel) | Amatoxins | Same as Death Cap | Very high |
| Galerina marginata | Amatoxins | Same as Death Cap | Very high |
| Gyromitra esculenta (False Morel) | Gyromitrin | Vomiting, seizures, liver failure | Moderate-High |
| Inocybe species | Muscarine | Salivation, tearing, urination, diarrhea, breathing difficulty | Moderate |
| Clitocybe species | Muscarine | Same as Inocybe | Moderate |
| Psilocybe species (Magic mushrooms) | Psilocybin | Hallucinations, disorientation, agitation, tremors, seizures | Low (but dangerous) |
| Amanita muscaria (Fly Agaric) | Ibotenic acid, muscimol | Vomiting, disorientation, delirium, tremors, seizures | Low-Moderate |
Dr. Jackson’s note: “There is no reliable way for a non-expert to tell safe wild mushrooms from deadly ones. Many deadly mushrooms look similar to edible species. When in doubt, assume it’s toxic. If your cat eats any wild mushroom, go to the emergency vet immediately.”
Symptoms of Mushroom Poisoning — What to Watch For
⚠️ Wild mushrooms: Symptoms can appear 30 minutes to 12+ hours after ingestion, depending on the toxin.
| Symptom | Timeframe | Severity | Action |
|---|---|---|---|
| Vomiting | 30 min – 6 hours | Moderate-Severe | Emergency vet |
| Diarrhea | 30 min – 6 hours | Moderate-Severe | Emergency vet |
| Drooling / hypersalivation | 30 min – 4 hours | Moderate | Emergency vet |
| Lethargy | 1-12 hours | Severe | Emergency vet |
| Abdominal pain | 1-12 hours | Severe | Emergency vet |
| Disorientation / stumbling | 1-12 hours | Severe | Emergency vet |
| Tremors / seizures | 1-24 hours | Emergency | Emergency vet |
| Liver failure (jaundice, pale gums) | 12-48 hours | Emergency | Emergency vet |
| Kidney failure (no urine) | 12-48 hours | Emergency | Emergency vet |
| Coma | 24-72 hours | Emergency | Emergency vet |
Dr. Jackson’s note: *”Do not wait for symptoms. If your cat eats a wild mushroom, go to the emergency vet immediately — even if the cat seems fine. Some mushroom toxins take 6-12 hours to cause symptoms, but by then, liver damage may already be severe.”*
Emergency Protocol — Cat Ate a Wild Mushroom
Step 1: Act immediately — do NOT wait for symptoms
| Action | Why |
|---|---|
| Go to emergency vet immediately | Time is critical — some toxins act fast |
| Bring a sample of the mushroom | Take a photo or bring the whole mushroom (wrap in damp paper towel) |
| Call Pet Poison Helpline: 855-764-7661 | While en route to vet |
| Do NOT induce vomiting unless told to | Some toxins cause rapid central nervous system depression |
Step 2: Veterinary treatment (what to expect)
| Treatment | Purpose |
|---|---|
| Induce vomiting (if within 1-2 hours) | Remove unabsorbed toxin |
| Activated charcoal | Bind remaining toxin in GI tract |
| IV fluids | Support kidney function, prevent dehydration |
| Blood work | Monitor liver and kidney function (ALT, AST, creatinine, BUN) |
| Liver protectants (SAMe, N-acetylcysteine, silibinin) | For hepatotoxic mushrooms (Amanita) |
| Vitamin K | For coagulopathy (bleeding disorders) |
| Anticonvulsants | For seizures |
| Hospitalization | 24-72+ hours |
| Plasma exchange / liver transplant | In extreme cases (rare in veterinary medicine) |
Step 3: Prognosis
| Time to treatment | Mushroom type | Prognosis |
|---|---|---|
| Treated within 2 hours | Amanita (Death Cap) | Guarded — liver damage may still occur |
| Treated within 6 hours | Amanita | Poor — high risk of liver failure |
| Treated immediately | Muscarine-containing | Good — antitoxin available |
| Any delay | Amatoxin-containing | Poor |
Emergency phone numbers:
| Helpline | Phone Number |
|---|---|
| Pet Poison Helpline (USA/Canada) | 855-764-7661 |
| ASPCA Animal Poison Control | 888-426-4435 |
| Your local emergency vet | (keep on your fridge) |
For detailed emergency protocol: What to Do If Your Cat Eats Something Toxic
Store-Bought Mushrooms — How to Safely Feed
Step 1: Choose the right mushrooms
| Do ✅ | Don’t ❌ |
|---|---|
| Store-bought mushrooms (white button, cremini, portobello, shiitake) | Any wild mushroom |
| Fresh mushrooms | Canned mushrooms (high sodium) |
| Cook thoroughly | Raw mushrooms (hard to digest) |
| Plain — no oil, no salt, no seasonings | Mushrooms cooked with onion, garlic, butter |
| Cut into small, pea-sized pieces | Fried mushrooms |
Step 2: Prepare properly
| Step | Instruction |
|---|---|
| 1 | Wash mushrooms thoroughly |
| 2 | Cook by boiling, steaming, or sautéing in water (no oil, no butter, no salt) |
| 3 | Cool completely |
| 4 | Cut into very small, pea-sized pieces |
| 5 | Serve 1 small piece |
Step 3: Portion control
| Cat type | Portion | Frequency |
|---|---|---|
| Healthy adult cat | 1 small piece (size of a pea) | 1-2 times per week maximum |
| Kitten (under 1 year) | ❌ Avoid | No benefit |
| Senior cat | ❌ Avoid | No benefit |
| Overweight cat | ❌ Avoid | No nutritional value |
| Cat with kidney disease | ⚠️ Caution | Mushrooms have potassium — consult vet |
| Cat with pancreatitis history | ❌ Avoid | Risk if cooked with oil/butter |
Step 4: Observe your cat
| Response | Action |
|---|---|
| Eats, no issues | Fine — limit to tiny amounts |
| Ignores mushrooms | Normal — many cats don’t like mushrooms |
| Vomiting or diarrhea | Too much or intolerance — discontinue |
| Lethargy (possible poisoning — unlikely from store-bought) | Call vet immediately |
Special Cases — Kittens, Seniors & Cats with Health Conditions
Kittens (under 1 year)
- ❌ Avoid completely
- No nutritional benefit
- Recommendation: No mushrooms
Senior cats (10+ years)
- ❌ Avoid completely
- No nutritional benefit
- Recommendation: No mushrooms
Cats with kidney disease
- ⚠️ Use caution — mushrooms contain potassium
- Recommendation: Avoid or consult vet
Cats with pancreatitis history
- ❌ Avoid — risk if mushrooms are cooked with oil/butter
- Recommendation: No mushrooms
Cats with IBD or chronic digestive issues
- ⚠️ Use caution — mushrooms contain chitin (hard to digest)
- Recommendation: Avoid
Healthier Alternatives to Mushrooms for Cats
| Alternative | Why it’s better | Full guide |
|---|---|---|
| Plain cooked chicken | High protein, cats love it | Can Cats Eat Chicken |
| Plain cooked turkey | Same as chicken | Can Cats Eat Turkey |
| Plain cooked eggs | High-quality protein | Can Cats Eat Eggs |
| Plain cooked green beans | Low calorie, fiber | Can Cats Eat Vegetables |
| Commercial cat treats | Formulated for cats, balanced | N/A |
| Freeze-dried meat treats | Single ingredient, animal protein | N/A |
For a complete list of safe human foods: Cat Food Safety Guide — Safe Foods Table
FAQs About Can cats eat mushrooms?
| Question | Answer |
|---|---|
| Can cats eat mushrooms? | Plain, cooked store-bought mushrooms (white button, cremini, portobello) are safe in tiny amounts. Wild mushrooms are TOXIC — can be fatal. |
| Are mushrooms toxic to cats? | Store-bought mushrooms: no. Wild mushrooms: YES — many species are deadly. |
| Can cats eat wild mushrooms? | No — never. Many wild mushrooms contain toxins that cause liver failure, kidney failure, seizures, and death. |
| Can cats eat white button mushrooms? | Yes — plain, cooked, in tiny amounts (1 pea-sized piece). |
| Can cats eat portobello mushrooms? | Yes — plain, cooked, in tiny amounts. |
| Can cats eat raw mushrooms? | Not recommended — hard to digest. |
| Can cats eat canned mushrooms? | Check label — often high sodium. Not recommended. |
| My cat ate a wild mushroom — what do I do? | Emergency vet immediately — do NOT wait for symptoms. Bring a sample of the mushroom if possible. |
| What are the symptoms of mushroom poisoning? | Vomiting, diarrhea, drooling, lethargy, disorientation, tremors, seizures, liver failure, kidney failure. Symptoms can appear 30 minutes to 12+ hours after ingestion. |
| Can cats eat magic mushrooms (psilocybin)? | No — toxic. Causes hallucinations, disorientation, tremors, seizures. |
| Are mushrooms good for cats? | No — they offer no nutritional value for obligate carnivores. |
Conclusion
Here’s what you need to remember about cats and mushrooms:
| Do ✅ | Don’t ❌ |
|---|---|
| Feed plain, cooked store-bought mushrooms in tiny amounts (if you must) | Feed any wild mushroom — emergency |
| Cook mushrooms thoroughly (no oil, no salt, no seasonings) | Feed raw mushrooms (hard to digest) |
| Cut into small, pea-sized pieces | Feed canned mushrooms (high sodium) |
| Choose better alternatives (cooked chicken, eggs) | Feed mushrooms cooked with onion, garlic, or butter |
| If cat eats wild mushroom → Emergency vet immediately | Wait for symptoms — some toxins take hours to appear |
The bottom line: Plain, cooked store-bought mushrooms (white button, cremini, portobello, shiitake) are safe for cats in very small amounts — 1 pea-sized piece, 1-2 times per week maximum. However, mushrooms offer ZERO nutritional value for obligate carnivores. There is no reason to feed them.
The real danger is wild mushrooms. Many wild mushroom species contain toxins that cause liver failure, kidney failure, seizures, and death. Even small amounts can be fatal. There is no reliable way for a non-expert to identify safe wild mushrooms.
If your cat eats any wild mushroom:
- Go to the emergency vet immediately — do NOT wait for symptoms
- Bring a sample of the mushroom (wrap in damp paper towel) or take a photo
- Call Pet Poison Helpline: 855-764-7661
Better treats for cats: Plain cooked chicken, plain cooked turkey, plain cooked eggs, or commercial cat treats.
Bookmark our Cat Food Safety Guide for all 54 foods — it’s your complete resource for feeding your cat safely.
Your cat depends on you to feed wisely. You’ve got this.
- ✅ Vet-reviewed by Dr. Allona Jackson, DVM — 2026
- 📅 Last updated: April 2026
- ⚠️ Disclaimer: This content is for informational purposes only and does not constitute veterinary medical advice. Always consult a licensed veterinarian for diagnosis and treatment of your pet’s specific condition. In an emergency, call your vet or a pet poison helpline immediately.
- 🔗 Back to pillar: Cat Food Safety Guide
- 🔗 Emergency: Pet Poison Helpline: 855-764-7661
