Can cats eat seaweed?
Quick answer: Yes, in moderation — cats can have seaweed in small amounts as an occasional treat.
Quick verdict
In moderation
Recommended amount
A small amount of plain, unsalted seaweed such as nori on occasion.
Why
A little plain seaweed is fine for most cats and some enjoy the taste.
Can cats eat seaweed, and why?
A little plain seaweed is fine for most cats and some enjoy the taste.
Cats are obligate carnivores: they must get most of their nutrition from meat and need nutrients such as taurine that only animal products provide. They lack some enzymes for processing plants and carbohydrates, so fruit and veg offer little benefit and can upset their stomach; many cats are also lactose intolerant.
How to feed seaweed to cats
- •How much: A small amount of plain, unsalted seaweed such as nori on occasion.
- •How often: An occasional treat, not a daily food. Any treat should be occasional and tiny — no more than about 10% of daily calories — and never replace a balanced cat food.
- •Young pets: Kittens have sensitive digestion and high growth needs, so introduce new foods cautiously and ask your vet.
- •Preparation: Always wash fresh produce, remove any pips, stones, seeds, peel or tough skin where relevant, and serve it plain — never with salt, sugar, oil, butter or seasoning.
More foods cats might eat
Make treat time better
Handy kit for feeding cats well:
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.
Cheese-Shaped Ceramic Cat Bowl
A charming cheese-shaped ceramic dish, roughly 17.5cm wide with a 450ml capacity. The smooth glaze wipes clean easily and adds playful character to feeding time.
Plush Snuffle Foraging Mat
A roll-up plush snuffle mat with cute animal designs. Hide treats in the folds and let your pet sniff and forage to find them - a rewarding enrichment game that beats boredom and slows feeding.
Tarhong Carmel Medallion Melamine Pet Food Saucer
A warm earthy-toned medallion saucer in durable BPA-free melamine — scratch-resistant, dishwasher safe, and non-slip.
Feeding & nutrition guides
Frequently asked questions
Can cats eat seaweed?
In moderation. A little plain seaweed is fine for most cats and some enjoy the taste.
How much seaweed can a cat have?
A small amount of plain, unsalted seaweed such as nori on occasion.
Can cats eat seaweed every day?
It’s best as an occasional treat rather than a daily food. Any treat should be occasional and tiny — no more than about 10% of daily calories — and never replace a balanced cat food.
Can kittens eat seaweed?
Kittens have sensitive digestion and high growth needs, so introduce new foods cautiously and ask your vet.
Free printable: safe & toxic foods for cats
seaweed is just one food — get the full one-page checklist of what’s safe, fine in moderation, or dangerous for cats. Vet-sourced, yours to print and keep.
Check seaweed for another pet
Sources
Our verdict on whether cats can eat seaweed draws on established UK and US veterinary and welfare organisations. Individual pets, quantities and preparation vary — always confirm with your own vet.