Dogster is reader-supported. When you buy via links on our site, we may earn a commission at no cost to you. Learn more.

Dog Nutrition

Can High-Protein Dog Food Cause Diarrhea? Vet-Verified Nutrition Facts

Kristin Hitchcock
By Kristin Hitchcock · Reviewed & fact-checked by Dr. Maxbetter VizelbergVet Approved
Dr. Maxbetter Vizelberg
Reviewed & Fact-Checked byDr. Maxbetter VizelbergDVM (Veterinarian)
A native of New Orleans, Louisiana, Maxbetter has been cultivating his interest in veterinary medicine since he's been a kid. From being read Russian children’s stories about “Doctor Aybolit” by his grandmother to interning at the Israeli Wildlife Hospital to working at numerous small animal hospitals, he has thoroughly enjoyed learning about and sharing his love for animals with others over the years. He prides himself on educating others to help give their animals the best possible lives and strives to provide the best medical care to his patients. Outside the clinic, he can be found performing his rap songs at open mics, playing soccer and basketball, and going on hikes with family and friends. He currently practices in New York City.View authorThe information is current and up-to-date in accordance with the latest veterinarian research. Learn more
Updated on June 29, 2026
Share
labrador-retriever-dog-eating

Some dogs are more sensitive to the protein in their food than others. For some with sensitive stomachs, high protein can lead to digestion issues, including diarrhea. These canines often need a food lower in protein, though an extremely low-protein food can also cause all sorts of problems. With a little bit of veterinary guidance and trial and error, you will learn how to feed your dog exactly the amount they need.

divider dog paws 2 oct 2024

Switching Your Dog’s Diet

Diarrhea in a dog can result from switching diets too quickly. If you just switched your dog’s diet to a high-protein diet, it may be that your canine simply isn’t used to the new dog food. Preferably, all dog food switches should be done slowly and progressively, ideally over 7 days.

Sometimes, dogs can also be sensitive to particular sources of protein. Your dog may be perfectly fine with high levels of pea protein. However, chicken may cause digestion problems. Therefore, strongly considering the protein source is crucial for choosing the right diet.

Simply put, practically all types of dog food can cause diarrhea, especially if the dog isn’t used to them.

Image Credit: SeventyFour, Shutterstock

What Happens When a Dog Has Too Much Protein?

Some dogs simply require more protein than others, such as athletic and agility dogs.

If your dog eats too much protein, there are several possible outcomes. Sometimes, nothing happens. Some dogs have rock-solid stomachs and eat almost anything, even if it includes too much protein.

Excessive protein, like fat, is typically stored in a dog’s body. Therefore, if your dog consumes too much protein, they may end up overweight or obese. Of course, obesity is linked to a variety of problems. Therefore, if you want your dog to remain healthy, they need to stay at a healthy weight.

Furthermore, excessive protein may also be expelled in your dog’s poop. However, some amino acids can be harmful to the environment, not to mention your yard. That protein has to be produced, and it is likely to be wasted if your dog doesn’t need it. If you notice brown spots in your yard around where your dog defecated, it’s likely because the poop was high in nitrogen. When you feed your dog too much protein, you’re wasting money and increasing your carbon footprint for little reason.

The Type of Protein Matters

Dogs don’t need just protein in their food. They need their constituent amino acids, which are found in different amounts depending on the protein source. After digestion, your dog will use the amino acids they need and save or expel those they don’t.

For this reason, the type of protein your dog eats matters. Sadly, we don’t know exactly what sort of amino acids a dog needs in all cases. There's much research within the pet food industry that still needs to be done. In general, it is recommended to leave your dog on their current diet if they’re doing well on it and their vet does not object. If they aren’t doing so well, consider switching them to a food that has a different protein source.

Image Credit: Dmytro Zinkevych, Shutterstock
divider dog paws 2 oct 2024

What Ingredients in Dog Food Cause Diarrhea?

Several ingredients can cause diarrhea in dogs—just like in people. Most dogs shouldn’t get diarrhea from ingredients commonly found in dog food. However, some may be sensitive to particular ingredients.

Some of the most common allergens include dairy, beef, chicken, eggs, soy, and wheat gluten. A food allergy can manifest itself as diarrhea, skin irritation, redness, and itchiness.

What Are the Causes of Diarrhea in Dogs?

While many owners are quick to blame a dog’s food, the truth is that there are many causes of diarrhea. Some of these causes are serious and need veterinary attention. However, others usually clear up on their own. For instance, stress can cause diarrhea, but this typically clears up after the stressful event has passed.

Here are some common causes of diarrhea:

  • Stress
  • Eating garbage
  • Change in diet
  • New treats
  • Ingesting a foreign, non-food object
  • Eating toxins
  • Medications (especially antibiotics)
  • Intestinal parasites
  • Certain viral infections (like parvovirus)
  • Certain bacterial infections (like Clostridial species)
  • Pancreatitis
  • Inflammatory bowel disease
  • Liver and kidney disease
  • Certain cancers

If you’re concerned about your pet’s well-being, we recommend consulting a veterinarian.

While some high-protein diets can cause diarrhea, there are also many other potential problems. For this reason, you may want to see your vet if you expect your dog’s diarrhea may be caused by something other than excess dietary protein.

divider dog paws 2 oct 2024

Conclusion

Occasionally, a high-protein diet can cause diarrhea in dogs. However, this issue can also be caused by other problems, including some serious diseases and conditions that need to be treated by a vet. If your dog has other signs, you should contact your vet to ensure it isn’t something more serious.

See also:

Sources

Featured Image Credit: Jaromir Chalabala, Shutterstock

The Dogster Newsletter

Expert dog care, straight to your inbox

News, insights, expert advice, and everything dog.

No spam — unsubscribe anytime.

By signing up, you agree to our Terms & Conditions and Privacy & Cookies Policy.

Click a star to rate. You can leave written feedback afterwards. (We read all feedback.)

Kristin Hitchcock
Authored by

Kristin Hitchcock

How Long Does A Dog Usually Have Diarrhea After Changing Food? Vet-Verified Facts

How Long Does A Dog Usually Have Diarrhea After Changing Food? Vet-Verified Facts

It's alarming to wake up to your dog having diarrhea. A million scenarios can quickly run through your mind, wondering what the cause of their runny stool may…

Keri-Beth Clur
By Keri-Beth Clur · 1 day ago
Dog Diarrhea: Our Vet Discusses Signs, Causes & Treatment

Dog Diarrhea: Our Vet Discusses Signs, Causes & Treatment

Almost all dog owners have encountered diarrhea at some point in their dog's life. A variety of causes can lead to diarrhea in puppies and dogs. Luckily, most…

Dr. Emma Chandley BVM
By Dr. Emma Chandley BVM · 3 weeks ago
How to Stop Diarrhea in Dogs: 5 Vet-Reviewed Tips

How to Stop Diarrhea in Dogs: 5 Vet-Reviewed Tips

A dog having diarrhea is not a fun experience for anyone. In addition to the mess it can leave around your home and yard, it can be very uncomfortable and some…

Jackie Brown
By Jackie Brown · 3 weeks ago
Should I Exercise My Dog When They Have Diarrhea? Vet-Reviewed Care Facts

Should I Exercise My Dog When They Have Diarrhea? Vet-Reviewed Care Facts

Exercise is important for your dog’s health, but what happens when their health has taken a turn for the worse? If your dog has diarrhea or is otherwise under…

Jordyn Alger
By Jordyn Alger · 3 weeks ago

How Much Crude Protein Should Be in Dog Food? Vet-Verified Facts & Advice

Finding out how much crude protein should be in dog food, as it turns out, is not an easy question to answer. Let's explore why. The amount of crude protein th…

Kristin Hitchcock
By Kristin Hitchcock · June 27, 2026
How Much Crude Protein Should Be in Dog Food? Vet-Verified Facts & Advice

Dog Food Sensitivity: Vet-Reviewed Signs & Treatment

Just like humans, dogs can also develop sensitivities and allergies, especially when it comes to their food. However, identifying and addressing the signs of d…

Annaliese Morgan
By Annaliese Morgan · June 17, 2026
Dog Food Sensitivity: Vet-Reviewed Signs & Treatment

What Is Hydrolyzed Protein Dog Food? Pros, Cons, & FAQ

If your dog is allergic to proteins or struggles with inflammatory bowel disease, you have probably heard about hydrolyzed protein dog food. Meat is one of the…

Keri-Beth Clur
By Keri-Beth Clur · June 29, 2026
What Is Hydrolyzed Protein Dog Food? Pros, Cons, & FAQ

Can Changing Dog Food Cause Vomiting? Vet-Reviewed Facts & Advice

I have a four-year-old Boxer who has a very strange thing happening. He is throwing up a foamy white discharge. He first threw up yellow...

Elizabeth Gray
By Elizabeth Gray · June 17, 2026
Can Changing Dog Food Cause Vomiting? Vet-Reviewed Facts & Advice

11 Most Common Food Allergens for Dogs & How to Avoid Them (Vet-Reviewed)

Excessive scratching, recurring ear infections, and GI upset are all signs that your dog could have an allergy. While eliminating certain foods is the easiest…

Brooke Norris
By Brooke Norris · July 10, 2026
11 Most Common Food Allergens for Dogs & How to Avoid Them (Vet-Reviewed)

How to Switch Your Dog's Food: 6 Vet-Approved Steps

When we choose a dog food, we might not consider that our dog won’t be a match for one reason or another. Or perhaps you haven’t had the results with the dog f…

Ashley Bates
By Ashley Bates · June 16, 2026
How to Switch Your Dog's Food: 6 Vet-Approved Steps

Can Dogs Eat Rice? Vet-Verified Nutrition Facts, Benefits & Risks

Rice is a staple food found in almost every kitchen worldwide, and there are many different varieties to choose from! If your dog is eyeing your rice-based mea…

Kathryn Copeland
By Kathryn Copeland · June 29, 2026
Can Dogs Eat Rice? Vet-Verified Nutrition Facts, Benefits & Risks

Is It Bad to Switch Dog Food Often? Vet-Reviewed Facts & FAQ

A mistake that many dog owners make is finding good dog food and sticking to it forever. In fact, that’s the advice that many people give—advice that may have…

Keri-Beth Clur
By Keri-Beth Clur · June 17, 2026
Is It Bad to Switch Dog Food Often? Vet-Reviewed Facts & FAQ

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.

You may opt-out at any time. View our Privacy Policy for more information.

The Dogster app on a phone