Can cats eat mozzarella?
In small amounts, yes, a cat can eat a little mozzarella without coming to harm — it is not toxic the way onion or chocolate is. But most adult cats lose much of the enzyme that digests milk sugar as kittens grow up, so even a mild cheese like mozzarella can bring on an upset stomach, and it has no place as a regular part of a cat's diet.
Picked for your pet
Bugalugs Scottish Salmon Oil for Dogs & Cats 500ml
A 100% natural daily supplement rich in omega 3, 6, and 9 from high-quality Scottish salmon — supports skin, coat, joints, and brain health.
£13.99
Dried Catnip & Cat Grass Leaf Treats
A tub of dried catnip and cat grass leaves to sprinkle over toys, scratchers and bedding.
From£8.99
Freeze-Dried Krill Treats for Cats & Dogs
Freeze-dried whole krill, a crunchy single-ingredient treat for cats and dogs.
From£8.99
Whiskas Kitten Chicken Dry Cat Food
Complete chicken dry food for kittens, available in several bag sizes
From£3.19
Why mozzarella isn't the treat it looks like
Cats are obligate carnivores with a nutritional need for meat, not dairy, and most lose a large part of their ability to digest lactose once they are weaned. Mozzarella is lower in lactose than a glass of milk, but it is not lactose-free, and a cat that is sensitive can still react to a small piece.
It is also higher in fat and salt than anything a cat's diet is built around, and cats are considerably smaller than the humans mozzarella is usually served to. A cube that seems trivial to a person is a meaningfully larger portion, relative to body size, for a cat.
What actually happens if a cat eats some
A cat who steals a small piece of mozzarella off a plate is very unlikely to come to serious harm. The realistic downside is a loose stool, a bit of wind, or mild vomiting a few hours later if their gut does not get on with the lactose or the fat content.
A cat who eats a genuinely large amount — say, raiding a whole ball of fresh mozzarella — is more likely to be sick or have diarrhoea simply from the volume and fat, in the same way any rich, unfamiliar food would upset a small stomach not built for it.
If you want to give a small taste
Keep it to a pea-sized piece, offered rarely rather than as a habit, and watch how your cat gets on with it afterwards before considering giving any more. A cat who has never had dairy before is more likely to react than one who has tolerated small amounts before, but that is not a reason to build it into their regular diet either way.
Never offer flavoured, smoked or seasoned mozzarella, or anything served with garlic, onion or a lot of salt, all of which are genuinely more dangerous to a cat than the cheese itself. Plain, fresh mozzarella in a very small amount is the only version worth considering at all.
What to reach for instead
If you want to give your cat something as an occasional extra, a treat made for cats is built around what a cat's digestion actually handles well, without the lactose gamble. Freeze-dried meat treats in particular give the texture and smell cats respond to without any dairy at all.
If the appeal of mozzarella is really about pulling a stretchy, chewy texture, a slow feeder or lick mat loaded with a cat-safe wet food does a similar job of holding a cat's attention for longer than a normal meal, without the stomach upset that comes with dairy.
More for your pet
Things we stock that owners commonly reach for here. Nothing on this page depends on you buying one.
James Wellbeloved Grain Free Adult Dry Cat Food Turkey
A grain-free turkey dry food for adult cats, with potato rather than rice or wheat for carbohydrate
£24.65
James Wellbeloved Kitten Dry Cat Food Fish
Single-protein fish dry food for growing kittens, excluding common allergens
£21.79
James Wellbeloved Senior Dry Cat Food Turkey
A single-source turkey dry food for senior cats, formulated with added joint-care ingredients
From£21.79
James Wellbeloved Light Adult Dry Cat Food Fish
A lower-calorie fish dry food for adult cats managing their weight, with joint-support ingredients
£24.65
Common questions
- Is cheese bad for cats?
- Most cheese, including mozzarella, is not toxic to cats, but it is not good for them either. Cats lose much of their ability to digest lactose as they grow up, so cheese in any quantity is a common cause of a mild but avoidable upset stomach rather than a genuine poisoning risk.
- Why is my cat obsessed with cheese?
- Cheese is high in fat and salt, both of which cats can find genuinely appealing, and some cats simply enjoy the smell and texture regardless of what their gut makes of it afterwards. Enjoying it and tolerating it well are two different things, so a keen reaction is not proof it agrees with them.
- Can kittens eat mozzarella?
- It's best avoided. Kittens are still building their gut flora and are generally more sensitive to anything outside their normal diet than adult cats, so a rich, dairy-based food like mozzarella is more likely to cause a stomach upset in a kitten than in a fully grown cat.
- What should I do if my cat eats a lot of cheese?
- Watch for vomiting, diarrhoea or a cat who seems off their food over the following day, and offer water as normal. A one-off bout that settles within a day is common and rarely serious, but ring your vet if your cat seems genuinely unwell, is repeatedly sick, or the diarrhoea doesn't clear up.
Related
Sources
Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.