Is porridge bad for cats?

Plain porridge cooked in water, offered in a small amount, is not known to be harmful to cats, though it offers no real benefit either. It is the additions — milk, sugar, or dried fruit — that turn a harmless bowl into a genuine problem.

Can cats have porridge with milk?

It is better avoided. Many cats are at least somewhat lactose intolerant, and porridge made with cow's milk is far more likely to cause loose stools or an upset stomach than the same porridge made with water.

Can cats eat oats generally?

A small amount of plain, well-cooked oats is not toxic to cats, but as obligate carnivores they do not need grains in their diet, and a complete cat food already covers everything they need. Oats are a rare novelty at most, not a food to build into regular feeding.

My cat ate porridge with raisins in it — what should I do?

Contact your vet, particularly if your cat ate more than a trace. Raisins and sultanas carry a recognised risk that is well established in dogs and is not worth assuming is safe for cats, so it is worth getting checked rather than waiting to see.

Can cats eat porridge?

A small spoonful of plain porridge, cooked in water with nothing added, is generally fine for cats as an occasional taste. It is not toxic, but it is not a food cats need either, since they are obligate carnivores whose diet should be built around meat rather than oats — so treat it as a rare curiosity rather than a regular addition to the bowl at breakfast.

Why plain porridge is not a concern

Oats themselves are not toxic to cats and a small amount of plain, well-cooked porridge is unlikely to cause any problem for most cats. Some owners offer a spoonful as a novelty, and there is nothing inherently dangerous in that as long as nothing else has been added to it before it reaches the bowl.

That said, porridge offers a cat nothing that a complete cat food does not already provide, and cats are obligate carnivores, meaning their nutritional needs are built around meat protein rather than grains. A little plain porridge now and then is not harmful, but it is not doing your cat any favours either, whatever the novelty value at breakfast.

What ruins an otherwise harmless bowl of porridge

Porridge made with cow's milk is the main thing to watch for, since many cats are at least somewhat lactose intolerant and milk-based porridge is far more likely to cause an upset stomach than porridge made with water. This is the same reasoning behind why a saucer of milk is a poor idea for a cat generally.

Sugar, honey, syrup and dried fruit like raisins or sultanas are all common porridge additions worth keeping away from a cat's bowl. Sugar and honey add nothing useful, and dried fruit in the raisin family carries a risk that is taken seriously in dogs and is not worth testing in cats either, given how little is actually known about a safe amount.

If your cat has eaten some porridge

A small amount of plain porridge is unlikely to cause any lasting problem. Watch for loose stools if the porridge contained milk, which is the most likely source of any reaction, and treat a single mild reaction as your answer for next time rather than something to worry over.

Contact your vet if your cat has eaten a porridge containing raisins, sultanas, a large amount of sugar, or if they seem unwell, are vomiting repeatedly, or are not themselves afterwards — those are reasons to get it checked rather than wait and see.

What to give instead

A proper cat treat or a small amount of their usual wet food gives your cat something to enjoy that is actually built around what they need nutritionally, rather than a bowl of oats that does nothing for a carnivore's diet.

If you want to offer a novelty now and then, keep it plain and small, and reach for a cat treat the rest of the time rather than making porridge a habit your cat comes to expect every morning.

Make treat time better

Things we stock that owners commonly reach for here. Nothing on this page depends on you buying one.

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

Turkey Tail Mushroom & Probiotic Powder

A bacon-flavoured turkey tail mushroom and probiotic powder you sprinkle over food. Made to support immunity, energy and gut health, with scoop guidance for every weight from small to large pets.

£13.99

Fast UK delivery

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

Browse all of Can cats eat… →

Common questions

Is porridge bad for cats?: Plain porridge cooked in water, offered in a small amount, is not known to be harmful to cats, though it offers no real benefit either. It is the additions — milk, sugar, or dried fruit — that turn a harmless bowl into a genuine problem.
Can cats have porridge with milk?: It is better avoided. Many cats are at least somewhat lactose intolerant, and porridge made with cow's milk is far more likely to cause loose stools or an upset stomach than the same porridge made with water.
Can cats eat oats generally?: A small amount of plain, well-cooked oats is not toxic to cats, but as obligate carnivores they do not need grains in their diet, and a complete cat food already covers everything they need. Oats are a rare novelty at most, not a food to build into regular feeding.
My cat ate porridge with raisins in it — what should I do?: Contact your vet, particularly if your cat ate more than a trace. Raisins and sultanas carry a recognised risk that is well established in dogs and is not worth assuming is safe for cats, so it is worth getting checked rather than waiting to see.

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.