Can Dogs Eat Seaweed is it Good Bad or Poison?

Is Seaweed Good or Bad for Dogs?

The good news is that dogs can eat seaweed without getting ill – at least in moderation. But is seaweed actually good for your dog?

Seaweed is a surprisingly nutritionally-dense turns out that it is one of the most nutritionally complete foods available, as it contains nutrients such as:

Can Dogs Eat Seaweed ?
Can Dogs Eat Seaweed?
  • Magnesium
  • Selenium
  • Iodine
  • Calcium
  • Potassium
  • Iron
  • B vitamins (some types of seaweed)
  • Omega-3 fatty acids

Many of these nutrients are just as important for dogs as they are for people. The exact amount of each nutrient varies depending on the type of seaweed, but eating small portions of seaweed may help give your dog a healthy, glossy coat. There are many benefits of kelp for dogs

In particular, Nori seaweed is a source of vitamin B12. Omega-3 fatty acids, can be good for dogs and may improve joint health. So the answer to can dogs eat seaweed should now be apparent.

Saber's Back On The Beach At Sunrise
Saber’s Back On The Beach At Sunrise

How Much Can Dogs Eat?

Just because dogs can eat seaweed doesn’t mean they should eat a lot of it. Nutrient supplements should be used sparingly, as some seaweeds contain poisons, such as arsenic and mercury. If you’re not sure how much to give your dog, make sure you ask your vet first.

When introducing any new food into your dog’s diet, you should always do so slowly and cautiously. It’s also a good idea to add new food types one at a time. Monitor your dog’s stool, appearance, behaviour and energy levels, and stop giving it to your dog if you think it’s causing an issue.

Can Dogs Eat Seaweed Wild or Dried?

Seaweed itself isn’t dangerous when taken in supplement form – but it can be dangerous to dogs.

When Seaweed is washed up on the beach during summer, the hot sun can quickly dry it. When it loses moisture the seaweed shrinks to a fraction of its previous size.

Unfortunately, if your dog digests the dried seaweed it is likely to expand as it absorbs fluid in the stomach and intestine. This causes blockages that can be potentially fatal if not caught early enough.

For this reason, be aware of any dried seaweed when walking your dog on the beach. If he goes near it, quickly pull him away. This applies to any type of seaweed, including mayweed, kelp and sea oak.

If you suspect your dog ate some dried seaweed, contact your vet immediately, as his condition could rapidly get worse. It may only take a few hours to go from perfectly healthy to close to death, so watch out for symptoms such as vomiting, diarrhoea and appetite loss.


In most cases, can dogs eat seaweed yes is the answer. In fact, many types of kelp are nutritionally dense, so in small amounts they may help improve your dog’s coat, joint health and cognitive function.

Saber tends to seek out fresh wet seaweed stalks on the beach and I have caught him eating it occasionally, but he has never eaten dried out seaweed. He always seeks out the wet stuff straight from the sea for chewing on. When he finds the dried out stalks he wants to play. This means I have to throw them for him to chase.

Can Dogs Eat Seaweed is it Good Bad or Poison? 1
Saber Chewing on Seaweed Stalk

Kelp Is Not The Same As Seaweed

“Seaweed is a term which can be used to describe many different marine-based species of plants and algae. But sea kelp is more specific. It describes the largest subgroup of seaweed. Seaweed ranges dramatically in size, whilst sea kelp is always quite large.

You can break seaweed down into three groups — red, brown and green. This colour has a direct effect on how much light seaweed absorbs via photosynthesis, which decides how close to the ocean’s surface it grows.

Sea kelp is officially labelled as a brown seaweed, even though it can vary in colour. Sea kelp itself can take many different forms. One of them is bull kelp, which grows along coastal fronts, can live for ten years and can reach lengths of 45 meters, or 150 feet.

Bladder kelp can grow to be a huge 50 meters in length and can weigh up to hundreds of pounds. Of course, there are smaller kinds of sea kelp like common kelp and Asian kelp which average a length of between one and two metres.”


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