The full answer
Seaweed covers many different species and products, so they are not interchangeable. This page covers plain, unseasoned seaweed sold as food for people.
Seaweed contains iodine. Too much iodine can affect the thyroid, so the sources advise small amounts only. If your dog has a thyroid condition or takes thyroid medication, ask your veterinarian first.
Seaweed snacks are often salted or flavoured, with soy sauce, garlic or other seasonings. Those are not covered here.
Wild seaweed washed up on the beach is not safe. Dried beach seaweed can swell in the stomach and cause a blockage, and it can carry other hazards.
Risks and Things to Know
- Wild or beach seaweed: not safe; dried seaweed can swell and cause a blockage.
- Excess iodine can affect the thyroid.
- Salt, soy sauce, garlic and other seasonings in snacks and salads.
- Too much at once can upset the stomach.
How Much Can Dogs Eat?
Offer only a small amount occasionally. The veterinary guidance we reviewed does not give a specific weight-based amount.
How Should I Prepare It?
- Plain, unseasoned, food-grade seaweed only.
- No seasoned snacks, seaweed salad, sushi or soy sauce.
