Can Dogs Eat Seaweed? What Pet Parents Should Know
Seaweed has been part of the human diet for centuries, but it’s becoming increasingly common in products made for dogs, too. From crunchy treats to daily supplements, more pet products now include seaweed, leaving many pet parents asking, “Can dogs eat seaweed,” and is it actually good for them?
The short answer is yes, but not all seaweed is the same. Different species offer different nutritional profiles, and factors like sourcing, harvesting, and processing all play an important role in the quality and safety of the final product.
To help answer some of the most common questions, we spoke with Mitchell Lench, founder and CEO of Ocean’s Balance, a Maine-based company dedicated to sustainably harvesting and developing seaweed ingredients for both people and pets.
In this guide, you’ll learn the potential benefits of seaweed for dogs, important safety considerations, and what to look for when choosing treats or supplements made with this increasingly popular marine ingredient.
Can Dogs Eat Seaweed?
The short answer is yes. Certain types of seaweed can be a safe and nutritious addition to a dog’s diet when they’re responsibly sourced, properly processed, and included in balanced treats, foods, or supplements. Seaweed has quietly become an ingredient in everything from dental chews and meal toppers to complete pet foods as researchers continue exploring its nutritional potential.
But here’s where many pet parents get confused: not all seaweed is the same.
“There are thousands and thousands of seaweeds from all different climates,” says Mitch Lench, founder and CEO of Ocean’s Balance. “Different seaweeds work differently for different pet needs as well.”
That’s one reason companies like Ocean’s Balance have become leaders in the growing marine ingredient industry. Based in Maine, Ocean’s Balance doesn’t simply purchase seaweed from suppliers.
The company farms select species, sustainably wild harvests others that can’t yet be cultivated at scale, and works closely with coastal communities to responsibly source high-quality seaweed for the food, wellness, and pet industries.
Meet Mitchell Lench
Before founding Ocean’s Balance, Mitchell Lench spent years working in impact investing, helping fund projects around the world. After moving to Maine, he recognized an opportunity to build something that could benefit coastal communities while introducing more people to one of the ocean’s most remarkable natural resources.
Today, Ocean’s Balance partners with farmers, harvesters, researchers, and manufacturers to responsibly source seaweed for human food, wellness products, and pet nutrition. Lench believes seaweed has enormous untapped potential.
“I think it will be the crop of the century,” he says.
What Exactly Is Seaweed?
One of the biggest misconceptions about seaweed is that it’s a single ingredient. In reality, “seaweed” is an umbrella term for thousands of marine plants found in oceans around the world. They vary in color, texture, nutritional makeup, and how they’re used in both human and pet nutrition.
“Kelp is a generic term for a number of brown seaweeds,” Lench shares. “Seaweeds are typically broken into three broad categories: red seaweeds, green seaweeds, and brown seaweeds.”
Within those categories are countless species, each with its own unique characteristics. Some are naturally rich in specific vitamins and minerals, while others contain bioactive compounds that researchers are studying for their potential health benefits. That’s why not every seaweed serves the same purpose.
“What’s really interesting about seaweed are the biocompounds in the seaweed,” says Lench. “It’s not just the taste or the look, but really what it contains. Different seaweeds work differently for different pet needs as well.”
Ocean’s Balance works with a variety of seaweed species, including both farmed and sustainably wild-harvested varieties. Some species, such as sugar kelp, are commonly cultivated in the cold waters of Maine, while others are responsibly harvested because they can’t yet be farmed at commercial scale. By understanding the unique properties of each species, the company helps pet food manufacturers choose the right marine ingredients for specific applications instead of treating all seaweed as interchangeable.
For pet parents, the takeaway is simple: seeing “kelp” or “seaweed” on an ingredient label is only part of the story. The species, sourcing, processing, and quality standards all play an important role in the final ingredient your dog enjoys.
Why Are More Pet Food Companies Using Seaweed?
Seaweed isn’t being added to pet foods and treats simply because it’s trending. Researchers and manufacturers are increasingly interested in the naturally occurring nutrients and bioactive compounds found in different species, and how they may support overall canine health.
According to Lench, one of the biggest areas of interest is digestive health. Certain seaweeds contain compounds that act as prebiotics, helping nourish beneficial gut bacteria. Others are being studied for their role in supporting dental health, healthy skin and coat, and overall wellness.
“It’s everything from gut health to dental health to coat,” he says. “They’ve really just touched the surface.”
That growing body of research has attracted the attention of some of the biggest names in the pet industry. Ocean’s Balance has collaborated on projects with companies such as Purina and Mars as manufacturers continue exploring how responsibly sourced seaweed can complement traditional ingredients while delivering nutritional value.
Seaweed also offers advantages beyond nutrition. Because it grows quickly without requiring fresh water or fertilizer, it represents a more sustainable ingredient option than many land-based crops. As pet food companies continue looking for ways to reduce their environmental footprint, marine ingredients are becoming an increasingly attractive part of the conversation.
For pet parents, that’s good news. While research is still evolving, the growing interest from veterinarians, nutritionists, and pet food manufacturers suggests that seaweed is far more than an unusual ingredient on a label. It’s an ingredient with exciting potential that scientists are continuing to explore.
How Ocean’s Balance Brings Seaweed From the Ocean to Your Dog’s Bowl
When it comes to seaweed, the journey matters just as much as the ingredient itself. Ocean’s Balance oversees nearly every step of the process, from farming and sustainable wild harvesting to drying, milling, and preparing seaweed for use in pet foods and treats. The goal is simple: provide manufacturers with high-quality marine ingredients they can trust.
The company partners with seaweed farmers throughout Maine, supplying seed and training to growers, many of whom already make their living on the water as lobster harvesters or oyster farmers. For species that can’t yet be farmed commercially, Ocean’s Balance sustainably wild harvests seaweed from remote coastal waters in Maine and neighboring New Brunswick, Canada.
Once harvested, the seaweed is carefully dried to reach the proper moisture level before being processed. Depending on the needs of the manufacturer, it may be milled into a fine powder, flakes, or granules.
“We will mill it into either powder or flake or granules, depending on the needs of the manufacturer,” Lench says.
Ocean’s Balance also operates under Safe Quality Food (SQF) certification, one of the food industry’s highest standards for food safety and quality. That attention to detail helps ensure manufacturers receive consistent, responsibly sourced ingredients that meet rigorous standards.
“It takes no fresh water, no fertilizer, nothing for it to grow,” Lench relates. “If you’re looking at it from a planetary health perspective and a low-carbon perspective, it really doesn’t get better than seaweed.”
Ocean’s Balance partners with coastal communities throughout Maine and eastern Canada, creating opportunities for people whose livelihoods have long depended on the ocean. Lobster harvesters, oyster growers, and independent fishermen are able to diversify their income by participating in seaweed farming and harvesting, helping strengthen working waterfronts while supporting a growing industry.
“We have about 40 harvesters working for us on a very remote island,” Lench says. “Seaweed is one of the bright spots.”
Why Quality and Sourcing Matter
One of the biggest misconceptions about seaweed is that one species is just as good as another. In reality, different seaweeds offer different nutritional characteristics, which is why Ocean’s Balance carefully selects and blends species based on the needs of the manufacturer and the intended application.
“I would kind of make the analogy to vegetables,” Lench says. “One seaweed may be like carrots. Another one may be like broccoli.”
Just as eating a variety of vegetables provides a broader range of nutrients, combining different seaweed species can provide complementary nutritional benefits. Some seaweeds naturally contain compounds that support digestive health, while others are being studied for their role in dental health, skin and coat condition, and overall wellness.
Thoughtful sourcing also helps manufacturers manage naturally occurring nutrients, such as iodine, by selecting the right species and incorporating them in appropriate amounts. Rather than treating seaweed as a single ingredient, Ocean’s Balance works with manufacturers to identify the species and blends best suited for each product.
Which Polkadog Treats Feature Ocean’s Balance Seaweed?
If you’re interested in introducing seaweed to your dog’s diet, Polkadog incorporates responsibly sourced seaweed from Ocean’s Balance into several of its treats, pairing thoughtfully sourced marine ingredients with simple, high-quality ingredients.
Wonder Nuggets Whitefish & Kelp combines wild-caught whitefish with nutrient-rich kelp in a limited-ingredient recipe that’s easy to love. Green Monstah features invasive green crab and Ocean’s Balance seaweed, creating a uniquely New England treat that supports both dogs and local marine ecosystems.
By partnering with Ocean’s Balance, Polkadog knows exactly where its seaweed comes from and how it’s responsibly harvested and processed before it reaches your dog’s treat bag. It’s one more way the company stays true to its commitment to thoughtfully sourced, high-quality ingredients.
Frequently Asked Questions
Can dogs eat seaweed?
Yes. Certain types of seaweed can be a safe and nutritious addition to a dog’s diet when they’re responsibly sourced, properly processed, and included in balanced treats, foods, or supplements. Different seaweed species offer different nutritional profiles, so choosing products from reputable manufacturers is important.
Is seaweed safe for dogs?
In commercially prepared dog foods, treats, and supplements, seaweed can be a safe ingredient. Like any ingredient, quality matters. Responsibly harvested and processed seaweed is very different from seaweed that has washed ashore or products intended for people. If your dog has an underlying medical condition or dietary restriction, consult your veterinarian before introducing new foods.
Is kelp the same as seaweed?
Not exactly. Kelp is one type of seaweed. As Mitchell Lench explains, “Kelp is a generic term for a number of brown seaweeds,” while seaweeds are generally grouped into three categories: red, green, and brown. Each type contains different nutrients and naturally occurring compounds.
What are the benefits of seaweed for dogs?
Researchers continue to study seaweed’s potential role in canine health. Different species may support digestive health, healthy skin and coat, and dental health because of their naturally occurring nutrients and bioactive compounds. According to Lench, scientists have “really just touched the surface” when it comes to understanding seaweed’s potential.
Can puppies eat seaweed?
Seaweed may be appropriate for puppies when it’s included in complete and balanced puppy foods or treats formulated for growing dogs. If you’re considering adding a seaweed supplement to your puppy’s diet, talk with your veterinarian first to ensure it’s appropriate for your puppy’s age, size, and nutritional needs.
Can dogs eat dried seaweed snacks made for people?
It’s best to avoid sharing seaweed snacks made for people. Many contain added salt, seasonings, garlic, onion, oils, or other ingredients that aren’t appropriate for dogs. Instead, choose treats or supplements specifically formulated for canine nutrition.
How much seaweed can dogs have?
The right amount depends on the product and your dog’s size, age, and overall diet. Follow the feeding guidelines on the product packaging and avoid giving large amounts of seaweed on its own. Moderation is important, particularly because some seaweed species naturally contain higher levels of iodine.
Are seaweed dog treats good for dogs?
They can be. High-quality seaweed dog treats made with responsibly sourced ingredients can be a nutritious addition to a balanced diet. Look for products from reputable brands that are transparent about ingredient sourcing and quality standards.
What should I look for in a seaweed dog treat or supplement?
Choose products made by trusted manufacturers that clearly identify their ingredients and prioritize quality sourcing. Companies like Ocean’s Balance carefully select, harvest, and process seaweed for use in pet products, helping ensure consistency, safety, and quality before it reaches your dog’s bowl.
Can dogs eat seaweed from the beach?
No. Seaweed washed up on the beach may be decaying, contaminated, or mixed with debris, pollutants, or other materials that could be harmful to dogs. As Lench explains, “People know seaweed from walking along the beach… it’s nothing like the seaweed you’re getting out in the ocean.” Seaweed used in reputable pet products is responsibly harvested and carefully processed before it’s included in foods or treat
The Bottom Line
Whether you’re looking for treats that support your dog’s overall wellness or you’re simply curious about emerging ingredients in pet nutrition, seaweed is one to watch. Researchers continue to explore its potential benefits, while companies like Ocean’s Balance are helping ensure the seaweed used in pet products is responsibly sourced, carefully processed, and backed by science.
As more research explores the role seaweed may play in canine nutrition, one thing is already clear: not all seaweed is created equal. The species, sourcing, processing, and quality standards all matter.
Companies like Ocean’s Balance and brands like Polkadog are helping bring responsibly sourced marine ingredients to pet parents who want thoughtfully made treats for their dogs.
As Lench puts it, “People know seaweed from walking along the beach… it’s nothing like the seaweed you’re getting out in the ocean.”
And that’s perhaps the biggest takeaway of all.
About the Author
Carol Bryant is an award-winning content strategist, copywriter, and founder of SmartDogCopy.com and FidoseofReality.com. The Immediate Past President of the Dog Writers Association of America (DWAA), she helps pet, animal health, and lifestyle brands grow through strategic copywriting and content marketing.