Vegetable
Can dogs eat seaweed?
Plain dried seaweed from the shop, such as nori, is safe in small amounts. Seaweed from the beach can be dangerous: dried strands swell in the gut, and it may be mixed with sand and toxins.
Why Salt in seasoned snacks; swelling of dried beach seaweed; high iodine in some supplements
By Maya HartIf your dog ate some
- A small amount usually causes nothing worse than a mild stomach upset.
- Offer water, skip the next treat and call your vet if vomiting or diarrhoea lasts more than a day or your pet seems unwell.
- If your dog ate dried seaweed on the beach, call your vet — it can swell and cause a blockage.
Signs to watch for
- Vomiting
- Swollen belly and straining (blockage)
- Excessive thirst after salted snacks
How much, how often
A small piece of plain nori.
Treats of any kind should stay under 10% of the day’s calories. Work out your pet’s calories
Serving it safely
- Plain, unseasoned nori only
- Avoid salted, spicy or wasabi snacks
- Keep dogs from eating beach seaweed
- Use kelp supplements only on your vet’s advice
Dogs and cats, side by side
Dogs In moderation
Plain dried seaweed from the shop, such as nori, is safe in small amounts. Seaweed from the beach can be dangerous: dried strands swell in the gut, and it may be mixed with sand and toxins.
How much: A small piece of plain nori.
Cats In moderation
A small piece of plain nori is safe for cats and many enjoy it.
How much: A small strip, occasionally.
Can cats eat seaweed?The details
Dried seaweed washed up on beaches is one of the less obvious seaside dangers. It soaks up water in the stomach and can swell to many times its size, causing a blockage, and dogs that gorge on it often swallow sand too. Beaches can also carry dead marine animals and, in warm weather, toxic algae.
Shop-bought nori is a different thing: a small strip is a safe treat. Kelp supplements are very high in iodine, which can affect the thyroid if overused.
Safer treats your dog can have instead
Questions owners ask
Can dogs eat seaweed?
Plain dried seaweed from the shop, such as nori, is safe in small amounts. Seaweed from the beach can be dangerous: dried strands swell in the gut, and it may be mixed with sand and toxins.
How much seaweed can a dog have?
A small piece of plain nori.
What makes seaweed risky for dogs?
Salt in seasoned snacks; swelling of dried beach seaweed; high iodine in some supplements.
What are the signs to watch for in dogs?
vomiting, swollen belly and straining (blockage), excessive thirst after salted snacks.
What should I do if my dog ate seaweed?
A small amount usually causes nothing worse than a mild stomach upset. Offer water, skip the next treat and call your vet if vomiting or diarrhoea lasts more than a day or your pet seems unwell. If your dog ate dried seaweed on the beach, call your vet — it can swell and cause a blockage.
Is seaweed safe for cats too?
A small piece of plain nori is safe for cats and many enjoy it.
Sources
Tailwise is for general information and is reviewed by veterinary professionals, but it is not a substitute for advice from your own vet, who knows your pet. How we check facts
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