Can Dogs Have Natto? Vet Insights on Fermented Soybeans for Dogs

Have you ever found yourself wondering, “Can dogs have natto?” Well, you’re not alone! As a holistic veterinarian, I often get asked about incorporating human foods into a dog’s diet. Natto, a traditional Japanese food made from fermented soybeans, is one such food that has stirred curiosity among dog parents. Let’s unravel this together.

Natto is a staple in Japanese cuisine, notable for its powerful flavor and sticky texture. It’s produced by fermenting soybeans with Bacillus subtilis, a beneficial bacteria, resulting in a food packed with nutritional value. Natto boasts high levels of protein, fiber, vitamins, and minerals. It’s particularly rich in vitamin K and the enzyme nattokinase, which are well-known for their heart-health benefits.

But as we all know, dogs’ dietary needs differ from ours. Dogs require a balanced diet rich in proteins, fats, carbohydrates, vitamins, and minerals. Although they can safely consume some human foods, others might be harmful to them. So, where does natto stand in a dog’s diet?

As a vet, I can tell you that dogs can eat natto in moderation. Natto’s high protein content aligns with dogs’ nutritional needs, while its probiotic nature can support their gut health. However, serving size and frequency matter, as too much of a good thing can tilt their diet off balance.

Fermentation enhances the nutritional value of soybeans, making them a good protein source for dogs. However, not all dogs may react positively to natto. Some dogs might be allergic to soy, while others may find fermented foods hard to digest.

Feeding natto to your dog could offer health benefits like improved digestion and heart health, thanks to its probiotic nature and the presence of nattokinase. Nevertheless, it’s essential to monitor your dog for any allergic reactions or side effects. If you notice any changes in their behavior or health, consult your vet immediately.

Introducing natto into your dog’s diet should be a gradual process, starting with small portions and keeping an eye on their reaction. If your dog doesn’t take to natto, fret not. There are plenty of other fermented foods and healthy alternatives you can explore.

Remember, every dog is unique. What works well for one may not work for another. Always consult your vet before introducing new foods into your dog’s diet. After all, their health and happiness are what matter most!

can dogs eat natto

Wanna learn more about the benefits of fermented foods for dogs? Check out which foods are safe, and which ones you should avoid. Fermented Foods for Dogs: Vet-Approved Benefits and Tips

Discovering what makes up the dietary needs of your furry friend can seem like a daunting task, but fret not! Understanding the essential nutrients your dog requires and knowing if they can consume human foods like natto can pave the way to their optimal health. Let’s dive in and unravel the mystery of your dog’s nutritional needs together.

Essential Nutrients for Dogs

Dogs, much like humans, require a balanced diet to keep their bodies functioning at their best. Let’s crack open the world of canine nutrition:

  • Proteins: These are vital for growth, maintenance, and repair of your dog’s body. Animal-based proteins like chicken, fish, or beef are excellent sources.
  • Fats: Fats provide energy, help the body absorb vitamins, and promote a healthy coat and skin. Look for foods with Omega-3 and Omega-6 fatty acids.
  • Carbohydrates: While dogs don’t necessarily ‘need’ carbohydrates in their diet, they can provide a valuable energy source and contribute to a healthy gastrointestinal tract.
  • Vitamins and Minerals: These are crucial for metabolic, nerve, and immune functions. They are usually adequately supplied in a balanced commercial dog food.
  • Water: This is perhaps the most overlooked essential nutrient, but it is vital for almost every bodily function. Always ensure your dog has access to fresh, clean water.

Note: The exact dietary needs can vary depending on a dog’s size, breed, age, and health status. Always consult your vet for personalized advice.

Can Dogs Eat Human Foods?

Now, let’s address the elephant in the room – can dogs eat human food? The answer is both yes and no. Some human foods can be beneficial and even healthy for dogs when given in moderation, while others can be toxic.

Foods like lean meat, certain fruits, vegetables, and grains can be an excellent addition to your dog’s diet. They can provide various vitamins and minerals not found in commercial dog foods. However, foods like chocolate, avocado, grapes, onions, and xylitol (a common sweetener) are harmful to dogs and should always be avoided.

So, where does natto fall on this spectrum? Is it a superfood for dogs, or is it a potential hazard? The answer is not straightforward and can depend on several factors, including how you introduce it into their diet.

To ensure your dog’s safety and health, it’s always best to consult with your vet before introducing any new food into their diet. They can provide guidance based on your dog’s specific needs and tolerances.

Remember, the key to a healthy diet for your dog lies in balance, moderation, and variety. While exploring new foods can be exciting, your dog’s nutrition should always prioritize their health.

In the next sections, we’ll dive deeper into the topic of natto for dogs, looking at the pros and cons of feeding this Japanese superfood to your furry friend. So, stick around, and let’s continue this fascinating exploration together!

Can Dogs Have Natto? A Vet’s Perspective

As a dog parent, you might have wondered, “can dogs have natto?” The answer isn’t a simple yes or no. It’s important to consider the potential benefits and drawbacks of feeding this fermented food to your furry friend.

The Pros and Cons of Natto for Dogs

Natto, a traditional Japanese dish made from fermented soybeans, is rich in protein, vitamins, and minerals. These nutrients can be beneficial for dogs. For instance, the high protein content can support healthy muscle growth, while the B vitamins can aid in energy production and optimal brain function.

Moreover, natto is a great source of probiotics, promoting a healthy gut microbiome. Regular intake of probiotics has been linked to improved digestion and immunity in dogs.

However, not all effects are positive. Some dogs may have soy allergies, which could lead to adverse reactions if they consume natto. Furthermore, the high sodium content in many store-bought natto products could pose risks for dogs with heart or kidney conditions.

Vet Insights on Dogs Eating Natto

Veterinarians acknowledge the potential health benefits of natto for dogs, especially when it comes to promoting digestive health. However, they also stress the importance of moderation and careful introduction.

Firstly, natto should never become a staple of your dog’s diet. Dogs need a balanced diet that includes a variety of nutrients, and too much of any single food can lead to nutrient imbalances.

Secondly, it is crucial to introduce natto slowly and monitor your dog’s reaction. Start with a small quantity and watch for any signs of discomfort or allergic reactions. These may include itchiness, skin reactions, gastrointestinal upset, and changes in behavior.

Lastly, vets recommend seeking out low-sodium, preservative-free natto products if you decide to feed natto to your dog. This is to avoid excessive sodium intake, which can be harmful to dogs.

In conclusion, while dogs can technically eat natto, it should be given with care and moderation. It’s always best to consult with a vet before introducing any new food into your dog’s diet. This ensures that potential health benefits outweigh any risks and that your dog continues to receive a balanced, nutritious diet.

The Impact of Fermented Soybeans on Dogs

How Fermentation Affects the Nutritional Value of Soybeans

The process of fermentation is a technique that has been used for thousands of years to enhance the nutritional value of foods. How does this process apply to soybeans, the primary ingredient in natto?

Fermentation transforms soybeans into a powerhouse of nutrition. The process enhances the bioavailability of nutrients, meaning your dog’s body can absorb and utilize them more effectively. It increases the levels of certain nutrients like vitamin K2, a nutrient that plays an essential role in your dog’s bone health. Furthermore, fermentation breaks down the anti-nutrients in soybeans, substances that can inhibit the absorption of nutrients in the body.

The Effects of Fermented Soybeans on Dogs’ Health

If you’re wondering “can dogs have natto?” you’re likely also wondering about the potential effects of fermented soybeans on your furry friend’s health.

First off, fermented soybeans, such as natto, are rich in probiotics. These are beneficial bacteria that can support your pet’s gut health, boost their immune system, and promote overall well-being.

In addition, natto is high in protein, which is crucial for your dog’s growth, repair, and maintenance of body tissues. It also contains fiber, which can aid in digestion and help manage weight.

However, it’s important to keep in mind that all dogs are individuals and what works for one might not work for another. Some dogs may find fermented soybeans hard to digest, leading to gastrointestinal discomfort, gas, or diarrhea.

Also, natto is typically seasoned with ingredients like soy sauce, mustard, and onions, which can be harmful to dogs. If you’re considering adding natto to your dog’s diet, it’s best to offer it plain and in moderation.

Overall, while natto can offer your dog some health benefits, it’s essential to remember it should not replace a balanced, species-appropriate diet. Always consult with your vet before introducing new foods into your dog’s diet. They can provide advice on appropriate serving sizes and monitor for any adverse reactions.

So, can dogs have natto? The answer is yes, but as with any human food, it should be given in moderation and under the guidance of your vet. It’s the responsibility of us, as pet owners, to ensure the foods we share with our pets contribute to their overall health and wellness.

can dog eat natto

Potential Health Benefits of Natto for Dogs

Probiotic Benefits of Natto for Dogs

Natto is a fermented soybean product, and like other fermented foods, it is a rich source of probiotics. Probiotics are beneficial bacteria that can support your dog’s gut health. They aid in digestion and can help boost your dog’s immune system. In fact, some studies suggest that probiotics can help dogs with a variety of gastrointestinal issues, such as diarrhea and inflammatory bowel disease.

The specific strain of bacteria used in natto fermentation, Bacillus subtilis, is known for its hardiness and ability to survive the harsh conditions of a dog’s digestive tract. This means that the probiotics in natto can potentially reach your dog’s gut intact, where they can provide the most benefit.

Natto and Dogs’ Digestive Health

In addition to its probiotic benefits, natto also contains a unique enzyme called nattokinase. This enzyme has been studied for its potential to aid in digestion and promote cardiovascular health. For dogs, this could translate into better nutrient absorption and improved overall health.

Natto is also rich in dietary fiber, which can help to regulate your dog’s bowel movements and contribute to a healthy digestive system. Fiber can help to prevent constipation in dogs and can also be beneficial for dogs with diarrhea, as it can help to add bulk to the stool.

Moreover, natto is a good source of protein, which is a crucial part of a dog’s diet. Dogs need protein for growth and maintenance of their body tissues, and it also plays a role in the production of hormones and enzymes. The protein in natto is plant-based, which can be a good alternative for dogs with allergies or sensitivities to certain types of meat.

Other Nutritional Benefits of Natto

Natto is also packed with several vitamins and minerals that are beneficial for dogs. It’s rich in vitamin K2, which is essential for bone health and blood clotting. Additionally, it contains high amounts of vitamin B2 (riboflavin), which can support your dog’s metabolism and overall health.

Furthermore, the fermentation process increases the bioavailability of nutrients in natto. This means that the nutrients are easier for your dog’s body to absorb and use.

While natto can provide several health benefits for dogs, it’s important to note that it should not be the main component of your dog’s diet. It can be used as a supplement or treat, but it should not replace a balanced, complete dog food. Always consult with your vet before introducing any new foods into your dog’s diet.

To summarize, here are some potential benefits of natto for dogs:

  • Rich in probiotics for gut health
  • Contains nattokinase, an enzyme that can aid in digestion
  • High in dietary fiber for digestive health
  • Good source of plant-based protein
  • Packed with vitamins and minerals
  • Fermentation increases nutrient bioavailability

Remember, every dog is unique and may react differently to new foods. Always monitor your dog’s reaction when introducing natto or any other new food.

Possible Risks and Side Effects of Feeding Natto to Dogs

Allergic Reactions to Natto in Dogs

As a dog parent, one of the primary concerns when introducing new foods into your pet’s diet is the potential for allergies. Just like humans, dogs can also have food allergies, and soy products like Natto are among the common allergens.

Dogs with a soy allergy can exhibit symptoms like itching, skin rashes, diarrhea, vomiting, and even breathing difficulties after consumption. If you notice any of these symptoms after feeding Natto to your dog, stop immediately and consult your vet. Even in dogs without a soy allergy, Natto can sometimes cause gastrointestinal upset due to its high fiber content.

Other Potential Risks and Side Effects

While Natto has several health benefits, its consumption is not without risks or potential side effects. One notable risk is the high sodium content in Natto. Dogs have a far lower tolerance for sodium than humans do, and excessive sodium intake can lead to conditions such as sodium ion poisoning in dogs. Symptoms of this can range from vomiting and diarrhea to seizures and even death in severe cases.

Another possible risk associated with Natto is the presence of Bacillus subtilis, the bacteria used in fermenting the soybeans to produce Natto. While generally considered safe for human consumption, it’s not fully understood how this bacteria might affect dogs, especially those with compromised immune systems.

Moreover, Natto is high in purines, substances that can exacerbate conditions like kidney disease and gout in dogs. For dogs with renal problems or those prone to forming uric acid stones, it would be advisable to avoid feeding them Natto.

It’s also worth noting that while the probiotics in Natto can be beneficial, introducing them too quickly or in large amounts can cause digestive upset, including bloating, gas, and diarrhea.

In conclusion, while Natto can provide several nutritional benefits for dogs, it is not entirely risk-free. Always consult with a vet before introducing new foods into your dog’s diet, especially those like Natto that are not traditionally part of a canine diet. Your vet can provide guidance based on your dog’s health status, breed, age, and other factors.

can my dog eat natto

How to Safely Introduce Natto to Your Dog’s Diet

So, you’ve done your research and have decided to introduce natto to your furry friend’s diet. That’s a fantastic decision! However, it’s crucial to introduce any new food gradually and monitor any changes in your pet’s behavior or physical condition. Let’s discuss how you can do this with natto.

Steps to Introduce Natto to Dogs

Remember, just like humans, each dog is different and may react differently to new foods. Here are some steps to safely introduce natto:

  • Start small: Initially, give your dog just a small amount of natto. A teaspoon is a good place to start. This will help your pet’s system adjust to the new food and make it easier for you to spot any potential reactions or side effects.
  • Mix with familiar food: Mixing the natto with your dog’s regular diet can make it more appealing and help your dog adjust to the new flavor and texture.
  • Gradually increase the amount: If your dog seems to enjoy the natto and doesn’t show any adverse reactions, you can gradually increase the amount over time. It’s important not to rush this process.
  • Keep it plain: Always serve natto plain, without adding any spices or seasonings. These can potentially harm your dog and mask any potential adverse reactions to the natto itself.
  • Consult your vet: Always check with your vet before introducing any new food into your dog’s diet, especially if your dog has a history of food allergies or digestive problems.

Monitoring Your Dog’s Reaction to Natto

Introducing new food isn’t just about feeding it to your pet. It’s also crucial to monitor your dog’s response. Here’s what you should look out for:

  • Changes in behavior: Look for changes in your dog’s energy levels, behavior, or mood after eating natto. If your dog seems unusually lethargic or irritable, it might be a reaction to the natto.
  • Allergic reactions: Some dogs can have an allergic reaction to natto. Symptoms can include itching, swelling, diarrhea, or vomiting. If you notice any of these symptoms, stop feeding your dog natto and consult a vet immediately.
  • Digestive issues: Monitor your dog’s stool and look for changes in consistency, color, or frequency. If you notice any changes, it could be a sign of a digestive issue caused by the natto.

Remember, every dog is unique, and what works for one might not work for another. Take your time, be patient, and make this a positive experience for both you and your pet. By following these steps and paying attention to your dog’s responses, you can safely introduce natto into your dog’s diet and potentially reap the benefits of this nutritious food.

Alternatives to Natto for Dogs

While natto could be a feasible addition to your dog’s diet, there are various other options if you are keen to include fermented foods that may hold similar or better nutritional value. These alternatives can also be beneficial if your dog does not react well to natto or simply does not like its taste.

Other Fermented Foods Safe for Dogs

Several fermented foods can be safely introduced to your dog’s diet. Here are a few examples:

  • Yogurt: A great source of probiotics, calcium, and protein. Always choose plain, unsweetened yogurt and avoid those containing artificial sweeteners, particularly xylitol, which is toxic to dogs.
  • Kefir: This fermented milk product is packed with probiotics. Its mild flavor and creamy texture could be a hit with your furry friend. As with yogurt, avoid flavored or sweetened versions.
  • Sauerkraut: Fermented cabbage, or sauerkraut, is full of gut-friendly bacteria. However, remember to serve it in moderation due to its high sodium content.
  • Kimchi: This Korean staple is another fermented cabbage dish that may benefit your dog’s gut health. Note, it can be spicy so opt for mild variations or make your own without the hot spices.

Healthy Alternatives to Natto for Dogs’ Diet

If you’re looking for non-fermented alternatives to natto, consider these healthy options:

  • Lean meats: Chicken, turkey, and lean cuts of beef are excellent protein sources for dogs. They can be cooked and served in small, manageable pieces.
  • Fish: Rich in omega-3 fatty acids, fish like salmon and tuna are beneficial for your dog’s coat and skin health.
  • Sweet potatoes: They are high in fiber and contain a good amount of vitamins and minerals. Remember to cook them before serving to your dog.
  • Carrots: Carrots are low in calories and high in fiber and vitamins. They make great chewy treats for dogs and are good for their dental health too.

Whether you decide to introduce natto or any of these alternatives to your dog’s diet, remember, every dog is unique. What works for one might not work for another. It’s always best to start with small quantities and observe your dog for any adverse reactions. And of course, always consult with your vet before making any significant changes to your dog’s diet.

Final Thoughts

Understanding what foods are safe and beneficial for our dogs can feel like a minefield, but with careful research and consultation with your vet, you can provide a varied and nutritious diet for your beloved pet. While natto can be a nutritious addition, it’s not the only option. A variety of fermented foods or simple, wholesome ingredients can equally contribute to your dog’s overall wellbeing. Remember, the goal is to ensure your furry friend is healthy, happy, and full of life. And sometimes, that might mean choosing a different path, and that’s okay. You’re doing great, dog parent. Keep seeking the best for your canine companion!


Frequently Asked Questions

1. Can dogs safely consume natto?

Yes, dogs can safely consume natto in moderation. However, it is important to introduce it gradually into their diet and monitor their reaction. Some dogs may have allergies or sensitivities to soybeans, so it’s best to consult with a veterinarian before feeding natto to your dog.

2. What are the potential benefits of feeding natto to dogs?

Natto is a fermented soybean product that contains beneficial nutrients such as protein, fiber, vitamins, and minerals. It also contains a natural enzyme called nattokinase, which may have potential health benefits for dogs, including improved digestion and cardiovascular health.

3. How should natto be prepared for dogs?

When feeding natto to dogs, it is important to remove any additional seasonings or additives that may be present. Plain, unsalted natto is the safest option for dogs. It can be served as a topping or mixed with their regular food. Always start with small portions to ensure your dog tolerates it well.

4. Are there any risks or side effects associated with feeding natto to dogs?

While natto is generally safe for dogs, some may experience digestive upset or allergic reactions. If your dog shows any signs of discomfort, such as vomiting, diarrhea, or itching, discontinue feeding natto and consult your veterinarian.

5. Can all dogs eat natto?

No, not all dogs can eat natto. Dogs with soy allergies or sensitivities should avoid consuming natto. Additionally, dogs with certain health conditions, such as pancreatitis or kidney disease, may need to avoid high-protein foods like natto. It is always best to consult with a veterinarian before introducing any new food to your dog’s diet.

Dr. Candy Akers, DVM

Holistic Veterinarian, Veterinary Clinic Owner, Veterinary Medical Supervisory Board Leader, Certified Raw Dog Food Nutrition Specialist, and Author Dr. Candy completed her undergraduate studies at The University of Delaware and graduated veterinary school in 2009 from Oklahoma State University. In high school, she was drawn to wildlife rehabilitation. Wildlife rehab gave her unparalleled experience in animal healing in a field that has limited resources and a wide variety of conditions to treat. Before vet school, Dr. Akers spent two years working full time providing oil spill response for wildlife all over the country. Since graduating with her Degree of Veterinary Medicine (DVM) in 2009, Dr. Candy has specialized in companion animal nutrition. Extensive education in nutrition has made her a firm believer in species specific-biologically appropriate diets. One of her passions is educating pet parents about the natural alternatives that actually work. She brings the best of holistic health and conventional medicine together in a unique approach to pet health. This approach is often applied to chronic diseases, allergies, and autoimmune conditions. She started her own veterinary practice 9 years ago in Colorado. Overall, she has dedicated her entire life to improving the health and happiness of animals everywhere.

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