14 Best Dog Foods for Sensitive Stomachs in 2023

This (updated) guide reviews all of the best dog foods for sensitive stomachs this year.

Dogs normally have hearty appetites with stomachs to match. But this doesn’t mean that some of them don’t have sensitive tummies. Having a sensitive stomach is not uncommon in dogs. Even the strongest can fall prey to this troublesome condition.

These digestive problems may not be emergencies, but of course, it isn’t good to see your pup suffer from digestive issues. If your dog is frequently showing signs that their food is not agreeing with them, it may be time to switch to food made with the sensitive tummy in mind.

I use a 40-point inspection checklist for all of the products reviewed on my blog and analyze factors such as ingredients, consumer reviews, brand reputation, and more.

Let’s dive in.

The Best Dog Foods for Sensitive Stomachs

How to Switch Dog Food

Hill’s Science Diet Adult Sensitive Stomach & Skin Dog Food

Best Overall, Best For Adults

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Top Ingredients: 1. Chicken, 2. Brewers Rice, 3. Chicken Meal, 4. Yellow Peas, 5. Soybean Oil

• Life Stage: Adult
• Suitable for: Small, Medium, Large breeds
• Caloric content (per cup): 394 kcal
• Form: Dry

This tasty sensitive stomach dog food from Hill’s Science Diet has a successful track record of alleviating digestive issues in most dogs. It features an array of highly-digestible ingredients, including chicken, brown rice, and soybean oil that support your dog’s nutritional needs and overall health.

Another notable feature of this dog food is its prebiotic support, which promotes gut flora and leads to stronger digestive health. It’s also an excellent choice for dogs with sensitive skin due to its omega fatty acid and vitamin E content that improves skin and coat health.

Analysis: Protein (min.) 20%, Fat (min.) 13%, Fiber (max.) 4%, Moisture (max.) 10%

Nulo Freestyle Limited+ Puppy Grain-Free Salmon Dog Food

Best For Puppies

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Top 5 Ingredients: 1. Deboned Salmon, 2. Salmon Meal, 3. Chickpeas, 4. Chickpea Flour, 5. Canola Oil

• Life Stage: Puppy and Adult
• Suitable for: Small, medium, large breeds
• Caloric content (per kg): 3,712 kcal
• Form: Dry

Whether you’ve got a puppy with a sensitive stomach or an adult with food allergies, Nulo Freestyle Limited+ dog food has all the right ingredients to fulfill their nutritional needs without placing any stress on their digestion. It has one of the highest protein contents amongst dog foods at 30% minimum, which is crucial for both puppies and adults in building muscle mass.

Any ingredient that has the slightest chance of irritating a sensitive stomach has been exempted from the recipe, including grains, potatoes, eggs, peas, soy, and artificial preservatives. Side by side, the dog food strengthens your dog’s digestive system with GanedenBC30 probiotics and nourishes their coat with omega fatty acids.

Analysis: Protein (min.) 30%, Fat (min.) 18%, Fiber (max.) 5.5%, Moisture (max.) 10%

CANIDAE Grain-Free PURE Senior Chicken & Sweet Potato Dog Food

Best For Seniors

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Top 5 Ingredients: 1. Chicken, 2. Chicken Meal, 3. Turkey Meal, 4. Sweet Potatoes, 5. Garbanzo Beans

• Life Stage: Senior
• Suitable for: Small, Medium, Large breeds
• Caloric content (per kg): 3,300 kcal
• Form: Dry

A dog’s digestive system becomes more fragile as they age — that’s where the grain-less Canidae Senior LID Dog Food comes to the rescue. The recipe is made from only 9 main ingredients, including chicken meat, sweet potatoes, and garbanzo beans. All of them are highly-digestible and ideal for fueling the most active dogs out there.

Canidae also removed all kinds of artificial additives and potential irritants from the recipe, such as corn, wheat, soy, red meat. Your dog also needs a shiny coat and strong immunity in their old days, which is fulfilled through omega-3 fatty acids and antioxidants. And lastly, the great tastes reviews make Canidae LID an excellent choice for owners of picky dogs.

Analysis: Protein (min.) 28%, Fat (min.) 10%, Fiber (max.) 5%, Moisture (max.) 10%

American Journey LID Lamb & Sweet Potato Grain-Free Canned Food

Best Wet Meal

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Top 5 Ingredients: 1. Lamb, 2. Lamb Broth, 3. Sweet Potatoes, 4. Sunflower Oil, 5. Flaxseed

• Life Stage: Adult
• Suitable for: Small, Medium, Large breeds
• Caloric content (per kg): 1,300 kcal
• Form: Wet

If you have a sensitive pup that’s addicted to canned food, try buying American Journey LID Dog Food the next time. This delicious recipe is built from a handful of ingredients like real lamb meat to promote muscle growth. For carbs, it uses non-grain alternatives like sweet potatoes to charge your dog for the entire day.

At the same time, American Journey is completely free from grains, peas, corn, wheat, or soy — all of which are known to cause diarrhea and other digestive problems in sensitive dogs. Omega fatty acids are also added to nourish your dog’s coat. This is topped off with a mouth-watering lamb broth that can make the pickiest dogs drool all over their food.

Analysis: Protein (min.) 9%, Fat (min.) 7%, Fiber (max.) 1.5%, Moisture (max.) 78%

Instinct LID Grain-Free Recipe Real Lamb Freeze-Dried Raw Dog Food

Best Raw Option

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Top Ingredients: 1. Lamb Meal, 2. Lamb, 3. Coconut Oil, 4. Peas, 5. Freeze Dried Lamb Heart

• Life Stage: Adult
• Suitable for: All Breeds
• Caloric content (per kg): 3,930 kcal
• Form: Dry

While other brands craft formulas from selected foods, Instinct Limited LID Diet follows a simple two-ingredient approach by using only one protein and one vegetable to reduce digestive upsets to a minimum. It sources most of the nutrients from lamb meat, peas, tapioca, and canola oil that encourage nutrient absorption and smooth digestion.

Antioxidants and omega fats are plentiful in the recipe and promote healthy fur and stronger immunity. Because the diet is so limited in ingredients, it will suit canines that are allergic to most ingredients like dairy, meat, and grains. 

Analysis: Protein (min.) 24%, Fat (min.) 21.5%, Fiber (max.) 3.5%, Moisture (max.) 10%

Purina Pro Plan Sensitive Skin & Stomach Salmon Large Breed Dog Food

Best For Large Breeds

Top 5 Ingredients: 1. Salmon, 2. Barley, 3. Rice, 4. Oat Meal, 5. Canola Meal

• Life Stage: Adult
• Suitable for: Large breeds
• Caloric content (per kg): 3,511 kcal
• Form: Dry

Specialized for big pups with delicate guts — Purina Pro Plan Large Breed Formula is a solid option for promoting digestive health in active canines. The main protein source in the recipe is salmon meat because it’s easy-to-digest and full of muscle-building amino acids. Grains like oatmeal and rice are used to fuel your dog’s intense workouts without triggering stomach problems.

Besides catering to sensitive guts, Purina Pro Plan also alleviates skin problems with omega-6 fatty acids. It contains glucosamine to reduce joint wear – which is a common disease in large and giant breeds. To strengthen your dog’s gut health, the food is fortified with prebiotic fibers that encourage gut bacteria and put an end to stomach issues.

Analysis: Protein (min.) 26%, Fat (min.) 12%, Fiber (max.) 4.5%, Moisture (max.) 12%

Blue Buffalo Basics Skin & Stomach Care Puppy Dog Food

Best For Small Breeds

Top 5 Ingredients: 1. Deboned Turkey, 2. Turkey Meal, 3. Oatmeal, 4. Peas, 5. Brown Rice

• Life Stage: Puppy
• Suitable for: Small, Medium, Large Breeds
• Caloric content (per kg): 3,649 kcal
• Form: Dry

Designed with gentle ingredients and a single protein — Blue Buffalo Basics is our top choice for owners of sensitive small breed pups. It starts with turkey meat to promote muscle nourishment and easily-digestible grains like oatmeal, brown rice, and potatoes for carbohydrates. You’ll also get mini-kibbles that are perfectly suit the small jaws of your dog.

Anything that can irritate your pup’s stomach — including beef, corn, wheat, soy, dairy, and artificial additives — are completely removed to ensure good digestive health. Blue Buffalo also incorporates a mixture of antioxidants and vitamins so your dog’s immunity stays strong and their body performs optimally. All of this is available in a highly-delicious kibble that any dog will find difficult to resist.

Analysis: Protein min. 26% | Fat min. 15%, | Fiber max. 5% | Moisture max. 10%

Holistic Select Adult Health Anchovy & Salmon Dog Food

Best Premium Option

Top 5 Ingredients: 1. Anchovy and Sardine Meal, 2. Brown Rice, 3. Oatmeal, 4. Rice, 5. Salmon Meal

• Life Stage: Adult
• Suitable for: Small, Medium, Large Breeds
• Caloric content (per kg): 3,599 kcal
• Form: Dry

Holistic Select Adult Health dog food manages to pack in tons of nutrients and wholesome foods into a super-tasty kibble. From anchovy and sardines to oatmeal and pumpkin, each ingredient digests quickly and absorbs fully into your dog’s body. Micronutrients like antioxidants, glucosamine, and taurine help in improving joint health and strengthening the immune system. 

Unlike most dog foods, Holistic Select also includes easy-digesting grains like brown rice that fuel energy levels throughout the day. It also contains probiotics that promote gut bacteria and improve digestive health. The dog food is exclusively manufactured in the US and is a favorite amongst picky dogs with sensitive stomachs.

Analysis: Protein (min.) 25% | Fat (min.) 13% | Fiber (max.) 4.5% | Moisture (max.) 10%

Purina ONE +Plus Skin & Coat Formula Dog Food

Best Low-Budget Option

Top 5 Ingredients: 1. Salmon, 2. Rice Flour, 3. Pearled Barley, 4. Oat Meal, 5. Fish Oil

• Life Stage: Adult
• Suitable for: Small, Medium, Large breeds
• Caloric content (per kg): 3,803 kcal
• Form: Dry

Instead of just catering to dogs with sensitive stomachs, Purina ONE Skin & Coat provides a nutritional solution for dogs that suffer from all sorts of sensitivities. Its selection of real salmon, rice, and oatmeal supports muscle growth and fuels your dog’s energy reserves in an easily-digestible package.

More than that, the recipe contains vitamin E and omega fatty acids that allow dogs with itchy and sensitive skin to grow soft and lustrous fur. The dog food is also a great choice for ageing canines as it contains antioxidants, glucosamine, and chondroitin that strengthen the immune system and improves joint health. 

Analysis: Protein (min.) 26%, Fat (min.) 16%, Fiber (max.) 3%, Moisture (max.) 12%

GO! SENSITIVITIES LID Salmon Grain-Free Dog Food

Best For Weight Gain

Top 5 Ingredients: 1. De-Boned Salmon, 2. Salmon Meal, 3. Tapioca, 4. Peas, 5. Lentils

• Life Stage: Adult
• Suitable for: Small, medium, large breeds
• Caloric content (per kg): 4,084 kcal
• Form: Dry

Packing 449 calories in each cup from a handful of ingredients — Go! Sensitivities makes for an excellent weight-gain formula for sensitive dogs. Its primary protein source is de-boned salmon, which is full of muscle-building protein and omega fatty acids. Carbs are derived from lentils, tapioca, and peas as they can induce a caloric surplus without causing diarrhea or vomiting.

As the food is designed for sensitive pups, it’s free from stomach-irritating foods like grains, gluten, poultry, corn, wheat, soy, and artificial additives. Nevertheless, you will find a range of micronutrients in the food — omega-3 fatty acids for skin health, dried chicory root for firmer stools, and vitamin E for strong immunity.

Analysis: Protein (min.) 24%, Fat (min.) 12%, Fiber (max.) 4.5%, Moisture (max.) 10%

Wellness Simple LID Grain-Free Healthy Weight Salmon & Peas Dog Food

Best For Weight Loss

Top 5 Ingredients: 1. Salmon, 2. Potatoes, 3. Peas, 4. Dried Ground Potatoes, 5. Tomato Pomace

• Life Stage: Adult
• Suitable for: Small, Medium, Large breeds
• Caloric content (per kg): 3,340 kcal
• Form: Dry

Bring your dog back into good shape without triggering stomach problems with Wellness Simple LID Healthy Weight Formula. The food is primarily made for obese canines, so it has reduced calories and fiber-rich carbs that don’t turn into body fat. It’s also free from grains and uses potatoes and peas for carbohydrates as they’re easier for sensitive pups to digest.

Besides making your dog slimmer, Wellness will improve their coat health with omega fatty acids and strengthen immunity using antioxidants. Your sensitive pup will also develop a stronger gut with prebiotics and probiotics. Allergens and irritants like corn, wheat, eggs, grains, and artificial additives are also eliminated from the formula so your dog suffers zero stomach problems during their weight-loss journey.

Analysis: Protein (min.) 26%, Fat (min.) 8%, Fiber (max.) 6%, Moisture (max.) 10%

Natural Balance L.I.D. Grain-Free Salmon & Sweet Potato Dog Food

Best For Allergies

Top 5 Ingredients: 1. Salmon, 2. Menhaden Fish Meal, 3. Sweet Potatoes, 4. Potatoes, 5. Sunflower Oil

• Life Stage: Adult
• Suitable for: Small, Medium, Large breeds
• Caloric content (per kg): 3,450 kcal
• Form: Dry

Natural Balance’s Salmon & Sweet Potato dog food provides the benefit of being both limited in ingredients and having a recipe made entirely from digestion-friendly foods for sensitive dogs. This list of foods includes real salmon, sweet potatoes, sunflower oil, and other wholesome ingredients that aid in muscle nourishment and make your dog more energetic.

In addition to this, the dog food is completely free from grains, peas, lentils, corn, and wheat so your dog can fully digest and absorb nutrients. Also, Natural Balance’s dog foods are manufactured exclusively in the USA to ensure the highest-quality end product.

Analysis: Protein (min.) 24%, Fat (min.) 10%, Fiber (max.) 4.5%, Moisture (max.) 10%

Diamond Care Sensitive Stomach Adult Grain-Free Dog Food

Best For Picky Eaters

Top 5 Ingredients: 1. Potatoes, 2. Egg Product, 3. Potato Protein, 4. Tomato Pomace, 5. Chicken Fat

• Life Stage: Adult
• Suitable for: Small, Medium, Large breeds
• Caloric content (per kg): 3,615 kcal
• Form: Dry

Diamond Care Sensitive Stomach Formula is the ultimate dog food for canines with an extremely fragile digestive system. It contains a very limited selection of ingredients and even exchanges meat for egg protein for extra sensitive dogs. The recipe is completely free from grains, gluten, corn, wheat, and soy, so even the most sensitive dogs can enjoy and fully digest a tasty meal.

To further strengthen your dog’s digestive tract, the dog food includes species-specific probiotics that promote gut flora and more efficient digestion. Also, the recipe contains numerous vitamins, minerals, and omega fatty acids that support your dog’s general health and helps them grow healthy fur.

Analysis: Protein (min.) 25%, Fat (min.) 13%, Fiber (max.) 3%, Moisture (max.) 10%

Purina Pro Plan Adult Sensitive Skin & Stomach Salmon & Rice Dog Food

Best For Active Dogs

Top 5 Ingredients: 1. Salmon, 2. Barley, 3. Rice, 4. Oat Meal, 5. Fish Meal

• Life Stage: Adult
• Suitable for: Small, Medium, Large breeds
• Caloric content (per kg): 4,049 kcal
• Form: Dry

Purina’s Pro Plan Sensitive Skin & Stomach dog food has created a special diet for sensitive dogs that boosts both digestive and skin health. The recipe is built from easily-digestible salmon, rice, and oatmeal that provide essential macro-nutrients, while fish oils and omega fatty acids nourish the skin and coat of your dog.

Moreover, the dog food plays a vital role in strengthening your canine’s digestive health through live probiotics and prebiotic fibers. Both of them support effective digestion and encourage nutrient absorption for a healthy and active canine.

Analysis: Protein (min.) 26%, Fat (min.) 16%, Fiber (max.) 4%, Moisture (max.) 12%

Buyer’s Guide

In this section, we will explore this subject in detail to help you pick the right food for your sensitive dog.

Signs and Symptoms of Sensitive Stomach in Dogs

Sensitive stomach in dogs is more common than you think. Also, it is a condition that grows gradually over time. Every dog is different, as are their symptoms. However, there are some common signs that should alert you right away. Regardless of the cause, dogs with sensitive stomachs should be fed with care. Continuing to give them foods that disagree with them may cause uncomfortable and undesirable symptoms, which include:

Gas

Flatulence is normal to a certain extent. But if your dog is experiencing sudden or excessive gassiness, this could indicate a problem. Often, this is due to improper diet.

Vomiting

Vomiting is the number one sign of stomach sensitivities caused by food. As much as your dog loves to eat, not every ingredient may agree with every breed. Stomach sensitivity and intolerance can increase with repeated exposure to the ingredients causing the upset. If not changed in time, this could lead to various disorders.

Vomiting is serious. It is time to enrich your dog’s nutrition with probiotic-rich ingredients and digestive enzymes. For persistent problems, you should consult your veterinarian as soon as possible.

Diarrhea

Diarrhea is the next most common symptom of a sensitive tummy. A runny stool may not seem like a big issue if it occurs once. But if it happens regularly, it could lead to a life-threatening situation. Do not let your canine get severely dehydrated by delaying medical attention.

Lack of appetite

Is your little munching machine refusing food? A persistent lack of appetite can be a major sign of stomach sensitivity. Your vet may recommend adjusting your dog’s diet so they get the energy and nutrition they need.

Weight Loss

If your dog is sensitive to certain types of foods, he might not enjoy eating it. Weight loss is common in pets with digestive issues and tummy sensitivities.

Ingredients to Avoid

Now that you know the symptoms, it’s easier to identify whether your dog has a sensitive stomach. You should be cautious about what you pick when it comes to selecting the right nutrition for your pet, paying special attention to the ingredients.

Here’s a list of things that can upset your canine’s sensitive stomach:

Dairy

Dogs are usually very fond of milk and other dairy products, but not all dogs can digest them. Some may experience acute intestinal distress in the form of vomiting, diarrhea, and gas.

If your dog is lactose intolerant, avoid giving any dairy, regardless of how much they love it. Also, steer clear of foods with dairy as a major ingredient on the label.

Fruits

Fruits can be a healthy snack for both dogs and humans alike. However, fruits that are rich in sugar content can be a struggle to digest for dogs with sensitive tummies. The sugar can further irritate the stomach and cause digestive disorders.

For kibbles and blends, the percentage of fruits should not exceed more than 10%.

Gluten

Most dog foods designed for dogs with sensitive stomachs are gluten-free. They do not include grains such as wheat, spelt, rye, or barley, which could be major contributors to causing digestive problems with your pet. Most dog owners prefer gluten- and grain-free food option to avoid various inflammatory health issues associated with the ingredients.

What to Feed a Dog with a Sensitive Stomach

Here comes the most important question!

Food intolerance may restrict you from feeding many of the popular options available out there. Here are a few things you must look for in dog food for dogs with gut sensitivities.

Fewer Ingredients

Limited Ingredient Diets are often the first choice among owners of sensitive dogs. Fewer ingredients have less of a chance of upsetting your pet’s tummy, and you can be more cautious of what you are feeding your little one. Also, these diets are balanced and complete, so you don’t have to worry about supplementing their food.

Easily Digestible Ingredients

The options we have listed in this article targets dogs with sensitive stomachs and digestive tract issues and are therefore formulated to promote easy and healthy digestion. When you pick a diet, make sure it is easy to digest and contain ingredients that naturally support digestion like sweet potato, lamb, rice, chicken, and potatoes.

It is also wise to pick a formula that features additional vitamins, minerals, and other supplements that support a sensitive stomach.

No Grains

As much as your dog loves eating food with grains, it isn’t the best option when it comes to their sensitive stomachs.

Pick brands where the manufacturers prefer high-quality proteins instead of grains. Wheat and corn are two common ingredients that could trigger food intolerance in canines. These are indigestible carbohydrates that could cause further issues for your beloved hound.

Complete and Balanced Diet 

Pick a food labeled as complete and balanced in nutrition. A balanced composition does not only guarantees hand-picked ingredients for sensitive dogs but also provides all essential nutrients that are important for your pet’s health maintenance.

Probiotic Enriched

Probiotics are crucial for a dog’s diet. These help with stimulating the digestive system and aids with smooth digestion. The diet you pick must include probiotics for maximum benefit. Your dog’s vet may also recommend an additional probiotic supplement for additional support.

Guarantee a Smooth Switch

If your dog is in love with his current food, switching their diet can be challenging. However, you can achieve great results with time and patience. The change should be gradual. Also, there are tons of delicious food choices specially crafted for sensitive pooches. The good flavor makes the transition easier. Here is a complete guide on how to make the switch.

These tips will help you pick the right food and ensure your pooch’s happy and long life!

FAQs

How do I find out if my dog has a sensitive stomach?

Sensitive stomachs often lead to digestion problems. Your poor pooch might struggle to digest food every time they eat and may experience several gastrointestinal symptoms. It is best to get your dog examined by a veterinarian for a proper diagnosis before concluding on your own.

What causes food allergies in dogs?

According to WebMD, 10% of all allergy cases in canines relate to food. The cause, however, is multi-faceted and can be due to the protein or fat content of the food, or certain ingredients that their stomachs don’t tolerate well.

Is it necessary to change a dog’s diet if he has a sensitive stomach?

Food is the number one reason why your dog has sensitive-stomach symptoms. Your pooch could be intolerant to certain ingredients, and changing their diet is one of the best ways to find out early about the triggers.

What ingredients should I avoid in a dog’s diet with a sensitive stomach?

Some common red-flag ingredients include wheat and corn gluten, grain meals, meat by-products, and rendered fat.

Are there specific diet options available for my dog with a sensitive stomach?

You can find a variety of expertly crafted food under different brands. There’s a specific selection for dogs with a sensitive stomach, like the ones mentioned in this article. Read the labels before you choose to avoid picking the one with the wrong ingredients.

Can I give raw food to my dog with a sensitive stomach?

While feeding kibble is the preferable option, you can still feed raw food to your pet with a sensitive stomach, provided you keep the transition slow and gradual. If the condition is serious, it is important to consult a veterinarian first.

What should I do if my dog keeps throwing up after changing the diet?

Visit a vet as soon as possible. Frequent vomiting can be more than just a sensitive stomach. A proper examination is necessary before you continue.

What is a limited ingredient dog food?

As the name suggests, a limited ingredient diet – also called L.I.D – contains fewer ingredients and components. This formulation makes it easier to identify any allergens so you can steer clear of those options.

Is a limited ingredient diet a good option to feed my dog with a sensitive stomach?

Limited ingredient diets are a recommended food option for canines with a sensitive stomach. It helps you catch the culprit faster and helps you get the situation under control.

What are the most common allergens for canines?

Some common culprits are:

• Types of undigestible proteins
• Insufficient levels of fiber
• Too much fat content
• Vitamin and mineral deficiency
• Low quality or grade of an ingredient

How do I deal with food intolerance in my dog?

Changing your dog’s diet is the first step. Second, by consulting a vet for recommendations related to food and over-the-counter medication. Also, increase the daily intake of probiotics by adding unsweetened, plain yogurt to your dog’s diet along with sweet potatoes, oatmeal, pumpkin, and bananas.

What symptoms to watch out for to find out if my dog has a sensitive stomach?

In addition to the most common symptoms like gas, vomiting, nausea, diarrhea, and bloating, other signs of a sensitive caused by food intolerance include itching, hives, skin rash, obsessive licking, and paw biting.

What’s the easiest food for a dog with a sensitive stomach to digest?

Kibble with ingredients such as lean meat, pumpkin, sweet potato, eggs, and white rice is easier for dogs to digest. Some dogs have intolerance towards chicken and eggs. If that’s your dog, avoid food options with these ingredients.

How can I tell if my dog is allergic to his food?

Signs of dietary sensitivity do not always appear in diarrhea and vomiting. Sometimes, the problem may present itself through itchy skin, chronic ear problems, flatulence, coughing, sneezing, and wheezing.

What protein is best for dogs with allergies and a sensitive stomach?

Not all proteins may be suitable for your pooch. Some proteins have better digestibility, such as protein from chicken, lamb, and beef.

Is runny poop a sign that my dog could be intolerant to his food?

It is indeed one of the major signs of food intolerance. However, runny poop can also be a sign of parasitic or bacterial infection. It is best to get these symptoms checked for a thorough diagnosis.

Will eliminating extra food items from my dog’s diet help?

Eliminating all extra food is a great way to find out if a certain food is an issue in your dog’s diet. Extra food includes table scraps, human food, or any additional treat your dog enjoys nibbling on.

Can emotional distress cause food intolerance in a dog?

Dogs respond to stress like humans do, with feelings of anxiousness. Anxiety and stress can majorly contribute to an upset stomach in dogs.