A lick of plain cheese won't land most cats in the vet's, so there's no need to panic if yours has pinched a crumb. The catch is that cheese isn't good for cats either. Most adult cats are lactose intolerant; cheese is high in fat and salt, and a few types of cheese are a firm no. So, can cats eat cheese? In tiny amounts, occasionally, most can get away with it, but it's far from an ideal treat.
Here's what this guide covers: why cats are so drawn to cheese, which cheeses in a typical British fridge are worst, how to use cheese for administering medication, sensible portions, and the meat-based treats that do the job better.
Is cheese safe for cats?
Plain cheese isn't toxic to cats, so a small piece on its own is unlikely to do harm (Cats Protection, 2023). That's about as positive as it gets, though. Cheese is high in fat and salt, low in the nutrients cats actually need, and tricky for most adult cats to digest. It sits firmly in the "not poisonous, but not good for them" camp.
Everything your cat actually needs comes from a proper cat food built around meat and fish, not from dairy. Two things are worth keeping in mind before you think about sharing any cheese with your cat: most can't handle lactose, and a handful of cheeses are an outright no. Both are covered below.
Why most cats are lactose intolerant
Most adult cats can't digest lactose, the natural sugar in dairy, and that's a normal part of their biology rather than an illness. Here's the short version of why:
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Kittens make plenty of an enzyme called lactase, which breaks down the lactose in their mother's milk.
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After weaning, lactase production drops off sharply, so the gut loses much of its ability to process dairy (International Cat Care).
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When a lactase-light cat eats cheese, the undigested lactose ferments in the gut.
That fermentation is what causes the upset: loose stools, wind, vomiting, or a sore tummy. Signs often show up around 12 hours after consuming cheese, sometimes a bit later, so a reaction the next morning may well trace back to last night's nibble.
It's the same reason the old saucer of cow's milk has fallen out of favour. The milk a kitten drinks from its mother is designed for them, but cow's milk and the dairy in cheese are very different things, and an adult cat's gut simply isn't set up for it. If your cat loves a milky treat, the specially formulated "cat milk" sold in supermarkets and pet shops has reduced lactose, which makes it a gentler option than anything from the fridge.
Why are cats so into cheese, then?
Cats aren't chasing the dairy; they're chasing the fat and protein that cheese is packed with. As carnivores, their taste buds are tuned to meaty, fatty flavours and barely register sweetness, so a strong-smelling lump of cheddar reads as "rich food" to them.
That's a useful thing to know, because it means you can scratch the same itch with a scrap of meat. A morsel of cat-suitable protein gives them the savoury hit they're after, minus the lactose problem. More on better swaps near the end.
Which cheeses are worse for cats than others?
If cheese does end up on the menu, the type matters a lot. Here's a rough ranking for the cheeses most likely to be in a UK kitchen, from "a crumb is unlikely to cause issues" down to "never":
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Hard aged cheeses (cheddar, parmesan, Red Leicester, Gouda): lowest in lactose, since most of it ferments away during ageing. Still fatty and salty, so a crumb at most.
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Cottage cheese: lower in lactose and fat than most, and sometimes suggested for a cat recovering from an upset tummy. Check with your vet before using it that way.
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Soft cheeses (mozzarella, brie, camembert, ricotta): higher in lactose, so more likely to cause a reaction.
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Cream cheese, mascarpone, processed slices: high fat, often with added stabilisers and preservatives. Best skipped.
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Salty or brined cheeses (feta, halloumi): far too much salt for a cat's small body. Skip.
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Smoked, flavoured, or herby cheeses: may hide garlic, onion, or chives, all of which are toxic to cats (PDSA). Avoid.
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Plant-based or vegan cheese: not a safe loophole. Often heavy on oils, additives, and sometimes onion or garlic. Skip these too.
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Blue cheeses (Stilton, Roquefort, Gorgonzola, Danish Blue): never. They're ripened with the mould Penicillium roqueforti, which can produce compounds linked to tremors and other ill effects in pets, so mouldy and blue cheeses are best treated as off-limits (UK Vet Companion Animal).
Can cats have cheese-flavoured treats?
Yes, in small amounts, and they're a safer bet than raiding the cheese shelf in the fridge. Treats made for cats are reformulated to strip out most of the lactose and come in sensible portion sizes, so they give the flavour without the same digestive risk. A couple of pointers:
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Keep them within the 10% rule: treats and toppers shouldn't make up more than around 10% of your cat's daily food (PDSA).
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If your cat is sensitive to dairy, even cheesy cat treats might unsettle them, so watch how they react the first time.
Using cheese to give your cat a pill
A small cube of cheese is a classic British trick for hiding a tablet, and it can work nicely when you're stuck. The fat and smell distract from the pill long enough for some cats to swallow it. To do it well:
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Use a tiny bit of mild cheddar or a smear of cream cheese, just enough to cover the pill, no more.
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Watch your cat actually swallow it, since plenty will lick off the cheese and spit the tablet out.
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If your cat reacts badly to dairy, ask your vet about cat-specific pill pockets or about having the medicine made up as a liquid or flavoured form.
A little plain cooked chicken or fish-based food often works just as well, without the lactose.
Why cheese shouldn't become a habit
A rare nibble is one thing, a daily ritual is another. The problem with regular cheese isn't a single crumb; it's what those crumbs add up to over weeks and months:
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Calories. Cheese is energy-dense, so even small pieces eat into a cat's daily allowance and can tip a cat towards being overweight.
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Salt and fat. Too much of both does your cat no favours, especially when it comes to their heart and kidneys.
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Crowding out real food. A cat filling up on cheese has less appetite for the meat-based meals that include all the ingredients and nutrients they really need.
Cats Protection has shared the case of a cat fed largely on cheese and milk that became seriously unwell and needed real intervention to recover. It's an extreme example, not the fate of a cat who once licked a cracker, but it's a useful reminder that cheese works as a rare treat and falls badly as a routine.
How much cheese can cats eat?
Less than you'd think. A piece the size of a pea is plenty for a first try, and even a cat that tolerates dairy shouldn't have more than that on the odd occasion. Cheese is calorie-dense and salty, so it should sit right at the bottom of that 10% treat allowance rather than near the top. If you want to be accurate about portions, weigh treats on kitchen scales instead of guessing by eye. Our feeding guide has more on balancing the day's food.
What to do if your cat ate cheese
Don't worry. A small amount of plain cheese isn't an emergency, and most cats are completely fine within a day. For the next 12 to 24 hours, keep half an eye out for:
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Loose stools or diarrhoea
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Vomiting
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A tender or bloated belly
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Unusual tiredness
Most cats need no help at all. Ring your vet straight away, though, if the cheese was blue, mouldy, very salty, or part of a dish containing onion, garlic, chives, or chocolate. For any suspected poisoning, the Animal PoisonLine runs a 24-hour service in the UK. If you're ever unsure, a quick chat with your vet can help put your mind at ease.
When cheese definitely doesn't suit your cat
Some cats should steer clear of cheese altogether, not just keep it small:
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Kittens past weaning: their lactase is already winding down, and their small stomachs need a complete kitten food, not extras.
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Cats with a known dairy sensitivity: most upsets after cheese are sensitivities rather than true allergies, but the answer's the same: leave dairy out
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Cats with kidney disease or on a low-sodium diet: cheese is too salty, so clear any treats with your vet first.
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Overweight cats working through a weight-loss plan: such a small bite carries a surprising amount of energy.
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Cats with diabetes or pancreatitis: high-fat foods like cheese can trigger or worsen a flare-up.
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Older cats with sensitive digestion: a more gentle topper suits them better, and a senior cat food is built for the way their needs change.
Better treats than cheese
The good news is cats don’t need cheese to get what they’re after. Fat and protein are easy to give them in better ways. Try:
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Small pieces of plain cooked chicken or turkey, no skin, bones, or seasoning
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Plain cooked white fish like cod or haddock, with every bone removed
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A spoonful of plain wet cat food as a topper, which also offers extra hydration
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A cheese-flavoured treat that's been made for cats
Adding a little wet food alongside dry is an easy win here, since it brings variety and extra water to the bowl. Whatever you choose, introduce it in small amounts at first and give your cat a few days to show you how they get on, exactly as you would with cheese.
