Short answer: store-bought mushrooms are generally fine for cats in small amounts, but wild mushrooms can be extremely dangerous. Given the risk, and that mushrooms offer little real benefit to an obligate carnivore, the simplest and safest approach is to avoid feeding mushrooms to your cat altogether.
Ever wondered if your cat can eat mushrooms? Some are okay in principle, but others can be seriously harmful — and telling the two apart isn't always straightforward. We'll look at the risks, what to watch for, and why it's usually simplest to skip mushrooms entirely.
Table of Contents
Understanding Cats and Their Dietary Needs
It's key to know what your cat needs to eat for their health. Cats need a balanced diet full of important nutrients to stay healthy.
Essential Nutrients for Cats
- Proteins: important for growing and fixing body tissues.
- Taurine: an amino acid vital for heart and eye health.
- Vitamins: like vitamin A and B vitamins, crucial for metabolism and vision.
- Minerals: needed for strong bones and body functions.
Common Food Sensitivities
- Lactose intolerance: cats often can't digest lactose, causing stomach problems.
- Gluten sensitivity: some cats react badly to gluten in grains.
- Protein allergies: some proteins can make cats allergic.
Can Cats Eat Mushrooms?
Cats might be curious about mushrooms, but not all are good for them — and it's worth thinking about whether feeding mushrooms is a good idea at all, even the safe kinds.
Why Caution Matters More Than for Most Foods
Unlike most "can my cat eat this" questions, mushrooms have an added complication: a cat that's used to eating mushrooms from your kitchen might be more inclined to investigate mushrooms it finds outdoors — and telling a safe mushroom apart from a dangerous one, like Amanita phalloides (death cap) or Amanita muscaria (fly agaric), isn't something a cat (or, often, an untrained human) can reliably do. This is the main reason it's simplest to leave mushrooms out of your cat's diet entirely, rather than a reflection of store-bought mushrooms being especially risky on their own.
Potential Risks Associated With Mushroom Consumption
Toxic mushrooms can cause stomach problems or, in serious cases, organ damage. Signs of mushroom poisoning in cats include vomiting, diarrhoea, or unusual tiredness. If your cat eats a wild or unidentified mushroom, treat it as a genuine emergency and contact your vet immediately.
Mushroom Varieties: What's Technically Non-Toxic
For context, here's how common mushroom varieties break down by risk — this is informational rather than a recommendation to feed any of them:
- Generally non-toxic if store-bought and cooked plain: champignon (white button), portobello, shiitake, enoki.
- Genuinely dangerous, wild-growing: Amanita phalloides (death cap), Amanita muscaria (fly agaric), and many other wild species.
Even among the "safe" list, mushrooms offer little nutritional benefit to an obligate carnivore, so there's no strong reason to actively introduce them — if your cat has occasionally had a small piece of plain, cooked, shop-bought mushroom without issue, that's not cause for concern, but building it into their regular diet isn't necessary either.
Signs of Mushroom Toxicity in Cats
If you think your cat ate a toxic mushroom, knowing the signs matters — quick action is crucial.
Common Symptoms to Look Out For
- Vomiting
- Diarrhoea
- Lethargy
- Seizures
- Loss of appetite
- Jaundice (yellowing of the skin and eyes)
- Difficulty breathing
These symptoms can appear quickly after a cat eats harmful fungi — catching them early matters for treatment.
When to Contact Your Veterinarian
Call your vet right away if you see any poisoning signs, or if your cat has eaten a wild or unidentified mushroom, even without symptoms yet. Have details ready — when they ate it, what it looked like if possible, and any symptoms observed.
Tips for a Balanced Diet for Your Cat
Creating a balanced cat diet is key for their health. Adding vet-approved vegetables and fruits can give them more nutrients and variety.
Incorporating Vegetables and Fruits
- Carrots
- Peas
- Pumpkin
- Blueberries
Start adding these foods slowly to avoid stomach upset. Cook or purée vegetables to make them easier for your cat to eat, and watch for any bad reactions to new foods.
Understanding Commercial Cat Food Options
Choosing the right cat food is important for a balanced diet. Look for foods high in named, high-quality protein and low in fillers, and check the label rather than relying on marketing claims alone. A food intolerance test, like those from My Pet Sensitivity, can also help you understand your cat's specific dietary needs and sensitivities.
Alternatives to Mushrooms for Treats
Given mushrooms offer little upside and carry the wild-mushroom confusion risk, plenty of other treats do the job better.
Other Safe Treats for Your Feline Friend
- Dried fish: packed with protein and omega-3 fatty acids.
- Baby carrots: a crunchy, low-calorie choice that offers fibre and vitamins.
- Cooked chicken: a classic favourite that provides high-quality protein.
- Green beans: a healthy, fibrous option that many cats enjoy.
- Commercially available cat treats: look for brands that use wholesome, natural ingredients.
Homemade Treat Recipes for Cats
- Tuna treats: mix together 1 can of tuna (in water), 1 egg, and 1 cup of whole wheat flour. Bake at 175°C for 15–20 minutes, and cut into small pieces.
- Chicken bites: boil chicken breast, shred it, and mix with 1 cup of oats and a small amount of catnip. Form into balls and bake at 175°C for 10–15 minutes.
| Treat | Main ingredients | Benefits |
| Dried fish | Fish | High in protein and omega-3s |
| Baby carrots | Carrots | Low-calorie, high in fibre |
| Cooked chicken | Chicken breast | Rich in protein |
| Green beans | Green beans | Nutritious and fibrous |
| Tuna treats | Tuna, egg, whole wheat flour | High protein and tasty |
| Chicken bites | Chicken, oats, catnip | Flavoursome and nutritious |
FAQs
My cat sniffed a mushroom growing in the garden — should I worry?
Sniffing alone isn't a concern, but if you know or suspect your cat has actually eaten any part of an unidentified outdoor mushroom, contact your vet straight away rather than waiting to see if symptoms develop.
Are mushroom-based cat supplements (like lion's mane) different from feeding raw mushrooms?
Purpose-made supplements are formulated and dosed specifically for pets, which is different from feeding a raw or cooked mushroom from your kitchen — if you're considering one, discuss it with your vet rather than assuming the same rules apply.
How can I stop my cat from eating mushrooms that pop up in the garden?
Regularly check your garden for mushrooms and remove them promptly, and supervise outdoor time where possible — this is a more reliable safeguard than trying to teach a cat which mushrooms are safe.
Knowing how cats and mushrooms interact helps keep your cat safe. Some store-bought mushrooms aren't dangerous in themselves, but given the confusion risk with wild varieties and the lack of any real nutritional upside, it's simplest to leave mushrooms off your cat's menu entirely and stick to treats that are unambiguously safe. For the full picture on what's safe, see our guide to what cats can eat.
Testing for food sensitivities can help make sure your cat gets the best diet — you can do this easily with one of My Pet Sensitivity's food intolerance tests, with results back in days.
To provide you with technically accurate, evidence-based information, content on the My Pet Sensitivity blog is reviewed by medical professionals with veterinary expertise.
Related reading: What Can Cats Eat?