Get

In Your Inbox

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

16 Signs Your Dog Has an Upset Stomach: Vet-Approved Health Facts

Share

close up pitbull lying on the floor

If you’ve ever been woken in the middle of the night by a symphony of gurgling and rumbling coming from your dog’s stomach, you know that your pup isn’t immune to tummy trouble. Whether they’ve eaten something that doesn’t agree with them or are suffering from something more serious, you’ll want to solve your dog’s stomach issues as soon as you can.

In this article, we cover 16 signs that your dog has an upset stomach. Remember to consult your veterinarian about any medical issue, even if you aren’t sure whether it’s serious.

divider dog paws 2 oct 2024

Top 16 Signs Your Dog Has an Upset Stomach

1. Eating Grass

Chances are you’ve heard that when a dog eats grass, it’s because they don’t feel well and are trying to make themselves vomit. While this is sometimes true, dogs also eat grass for other reasons, so it is not the most reliable sign that your dog has an upset stomach.

Researchers have also done several studies to determine if this popularly held theory is actually true.1 Most of the results suggest that eating grass is not definitively linked to an upset stomach in all dogs, but it does occur in some. To be safe, monitor your dog to see if they develop any other signs of an upset stomach besides just eating grass.


2. Loss of Appetite

dog not eating its food
Image Credit: Daria Lixovetckay, Shutterstock

Much like how humans don’t feel like eating when they are nauseated, your dog may steer clear of their food bowl if they have an upset stomach. They may stop eating completely or eat less than usual. Some dogs stop eating their regular food but may continue to eat treats or people food, such as chicken or hamburgers. Decreased appetite can be a non-specific sign in dogs. This means it can be a sign of many different diseases and conditions, not just an upset stomach.


3. Excessive Licking

Dogs with upset stomachs often lick excessively. They may lick their lips or objects around them. Some dogs will even stick their tongues out and appear to be licking the air. Dogs may perform this behavior in an attempt to control waves of nausea. Like many of the other signs of an upset stomach, this one can also indicate different issues with your dog. Lip licking can be a sign that a dog is anxious or stressed. You may need to observe your dog for other signs to confirm they are suffering from an upset stomach.


4. Changes in Water Drinking

dehydrated pug beside a bowl
Image Credit: New Africa, Shutterstock

If your dog’s water consumption suddenly changes, they may be dealing with an upset stomach. Often, you’ll notice that your dog is drinking less water, similar to how their appetite may decline. Some dogs drink more water when they have an upset stomach because they continuously vomit.

Guzzling a lot of water can also signal other medical conditions, including diabetes. Take this sign seriously because even if it’s just a sign of an upset stomach, your dog could become dehydrated if they aren’t drinking enough.


5. Gulping

If your dog is battling reflux and nausea, you may notice that they seem to be gulping and swallowing more often. Suspect an upset stomach if you spot your dog performing this behavior when they aren’t eating or drinking. The owners of large, deep-chested dogs should be extra cautious if they observe this sign. Gulping excessively could lead to the dog swallowing a lot of air, which is one risk factor for developing a life-threatening condition called bloat.


6. Fatigue

Senior dog resting at the floor
Image Credit: Larissa Chilanti, Shutterstock

A pup that suddenly seems extra tired and reluctant to play or go on walks could be dealing with an upset stomach. Not feeling well can be exhausting for dogs, just like for us. Their bodies know when they need a little extra rest. However, fatigue is another sign that can indicate many different conditions, some of them serious. Before assuming your pup is tired from tummy trouble, see your veterinarian to rule out additional concerns.


7. Depression

Depression and fatigue are somewhat interchangeable. Depressed dogs may seem “checked out” or uninterested in their daily routine. They may not respond when you call them or acknowledge the attention of other pets in the house. When they’re depressed, dogs aren’t just tired physically but mentally too.

In the case of an upset stomach, your dog may be uncomfortable or painful, which makes them feel indifferent to life. Dogs can show signs of depression for other reasons as well, so you may need to look for other signs to determine whether an upset stomach is to blame.


8. Adopting the “Prayer Position” or “Downward Dog”

beagle in downward position
Image Credit: jukgrapong, Shutterstock

Dogs with upset stomachs often feel discomfort or pain in their bellies. One sign of this pain is if you notice your dog stretching low on their front legs but leaving their rear in the air. This position, similar to the “downward dog” yoga pose, is sometimes called the “prayer position” as well. Your dog may want to lie down and get comfortable but find it too painful to put weight on their upset stomach. They may also use this position to stretch out a cramping gut or relieve pressure from built-up gas.


9. Vomiting

This is one of the two most obvious signs that your dog has an upset stomach, though vomiting can be a sign of other illnesses as well. Dogs may vomit food, water, or yellowish-green stomach bile. If your dog begins vomiting, try to observe how long after eating or drinking they throw up, how many times, and what the vomit looks like. This information will be helpful to your vet as they try to diagnose what’s going on.

If your dog looks like they are trying to vomit, but nothing is coming out, this could also be a sign of bloat, especially in a large dog. Bloat is an emergency, but you should always consult your vet if your dog is vomiting because they can become dehydrated.


10. Diarrhea

Diarrhea is another sign that your dog has an upset stomach. Dogs often develop diarrhea if they eat something that doesn’t agree with them or if their food is changed too quickly. This sign can also have other causes, especially in puppies.

Intestinal parasites or parvovirus are two common culprits for diarrhea in young dogs. If your dog has profuse diarrhea, dehydration is a concern, particularly if they aren’t eating and drinking well either. Contact your veterinarian if you notice this sign of an upset stomach.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1


11. Drooling

Nauseated dogs—especially those with reflux—often produce an excessive amount of drool. We already mentioned that lip licking is a sign of an upset stomach, and sometimes that behavior also serves to try and keep the drooling under control. This sign may be hard to pinpoint in some breeds, like the Mastiff or Saint Bernard, which naturally drool more than others. Drooling can also be a sign of anxiety, adding a bit more mystery to interpreting this sign.


12. Noisy Stomach

We mentioned this one in our introduction, and it’s certainly one of the harder-to-miss signs that your dog has an upset stomach. The official term for stomach noises is borborygmi, and they can be a perfectly normal part of the digestive process. Muscle movement along the dog’s digestive tract typically causes some noise as food and water pass along. However, excessive gurgling or rumbling in your dog’s stomach can be a sign that something is amiss, especially if it accompanies other signs on our list.


13. Excessive Gas

Dogs typically have some gas in their stomach. It can occur as a side effect of digesting certain foods or because the dog has swallowed a lot of air when panting. However, if your dog builds up too much gas, it can result in an upset stomach. You’ll recognize this sign by your dog burping or passing gas excessively, making it one of the smellier and more unpleasant signs on our list. For big dogs, a stomach full of gas can quickly become life-threatening if they bloat.


14. Restlessness

french bulldog panting
Image Credit: Lee Waranyu, Shutterstock

If your dog is pacing, panting, or can’t seem to lie down and get comfortable, they could be restless due to an upset stomach. Nausea can make a dog uncomfortable, if not outright painful. Dogs show pain in many different ways, one of which is restlessness. Without other signs of an upset stomach, however, it can be hard to determine if your dog is restless from a painful belly or some other cause.

Stress and anxiety can also cause similar signs, especially thunderstorm fear. Pain in any area of the dog’s body can cause them to act restless, especially in their back or neck.


15. Sensitive Belly

If your dog eyes you suspiciously when you try to pet their belly, they could be experiencing pain from an upset stomach. Sometimes, it becomes so painful that they growl or snap at anyone who comes too close to their belly. You may notice your dog scratching, biting, or chewing at their belly if it hurts. Their abdomen may seem tense or even look swollen.

Obviously, you don’t want your dog to be in pain, so see a veterinarian as soon as possible if you notice this sign. Very painful bellies can indicate your dog has progressed from having an upset stomach to a more serious condition, such as pancreatitis.


16. Behavior Changes

dog in pain aggressive
Image Credit: Bonsales, Shutterstock

Any sudden change in your dog’s behavior can be a sign that they aren’t feeling well, possibly with an upset stomach. A normally gentle dog may display aggressive behavior, or a typically outgoing pup may hide away from household activity. Unlike a painful belly, which is a fairly obvious sign of an upset stomach, behavior changes can have many causes.

General pain or discomfort can be one cause, while older dogs could be developing cognitive dysfunction or doggy dementia. Brain conditions, including tumors, are another possible cause of behavioral changes. If your dog’s behavior changes without other signs of an upset stomach, especially if they seem to be progressively getting worse, you may be dealing with something more serious.

divider dog paws 2 oct 2024

Conclusion

Upset stomachs are among the most common afflictions for our canine friends due to their tendency to eat anything and everything. If you notice any of these 16 signs or are concerned about your pup’s health in any way, don’t hesitate to contact your veterinarian. It’s always better to be safe than sorry.

See also:


Featured Image Credit: Mikorad, Pixabay

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Dogster's Digital Magazine is Back!​

Dogster Magazine Cover June 2026

Vet-approved health & behavior advice

Real dog stories & community features

Ask Dr. Paola- Help! My Vet Suggests a Biopsy for My Dog! (June 15, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Some Dogs Treat Mealtime Like Playtime – And When to Pay Attention

Most dogs are reliable eaters. Bowl goes down, food disappears. So when a dog starts batting kibble across the kitchen floor, tossing pieces...

Major Win for Dogs: Ontario Becomes the Final Province to Ban Ear Cropping and Debarking

​​Ontario has approved new animal welfare regulations that will prohibit elective ear cropping and devocalization (debarking) procedures in dogs from January 1, 2027....

Dogster’s Weekly Photo Contest Winners: Most Adorable Puppy (June 8, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

More related

Labrador Retriever Puppies for Sale in New York: 2026 Breeders List

For many years, Labradors have been a popular dog breed in the US. They are known for their excellent temperament, versatile abilities, intelligence,...

8 Best Hydrolyzed Dog Foods in 2026 – Reviews & Top Picks

Owners are becoming more discerning about the ingredients and preparation of their pet’s food. Many times, there are products that we have never...

How to Build Confidence in a Dog: 6 Vet Reviewed Tips

Dogs are amazing animals that show loyalty, affection, playfulness, and never-ending forgiveness. A healthy and happy dog is exuberant and confident in what...

Do Dogs Feel the Cold? Coat Types & Tips to Keep Them Warm

We know, we know—it seems like dogs have coats that keep them naturally protected from inclement weather. But can your dog feel the...

Keep reading

How Much Does The Farmer’s Dog Food Cost? 2026 Pricing Update

When you want to give your dog food that’s the best of the best, fresh is the way to go. But we all know that fresh food costs more than traditional kibble. So, how much does a food like The...

Finny with the farmer's dog food

Purina Pro Plan vs. Kirkland Dog Food: Pros, Cons & What to Choose

Trying to choose the right dog food can be an overwhelming experience. Comparing ingredient lists, calories, nutrition tables, and flavors seems like a never-ending, confusing battle. You want to give your dog the best food possible, but it’s difficult to...

Dogster_Dog Food Purina Pro Plan VS Kirkland

11 Best Wet Dog Food for Huskies in 2026 – Reviews & Top Picks

Every Siberian Husky owner knows that these dogs have tons of energy. Huskies require a quality, high protein diet low in carbs to recharge and refuel, making the decision of what to feed an important task. Huskies are extremely active...

husky eating

When Was Dog Food Invented? History, Facts & FAQ

Do you know when dog food was invented? The answer may surprise you! Dog food has a long and complicated history, and the way we feed our dogs today has changed a lot over the years. In this post, we’ll...

woman buying dog food

Can Dogs Eat Grits? Vet-Verified Nutrition Facts & FAQ

Grits are a popular breakfast staple, especially in southeastern U.S. states. Grits are derived from white corn kernels and are a quick and easy way to grab a little bite to eat before heading out the door in the mornings....

Can Dogs Eat Grits

11 Best Senior Dog Foods in 2026 – Reviews & Top Picks

You’ll start to notice as your puppy grows to adulthood and beyond that, just like humans, their body starts to slow down and wear out. Once that starts happening, pet owners know that the senior years have started. It may...

dog eating

Feeding Your Maltipoo: A Vet-Approved Guide

Maltipoos (a mix between a Miniature or Toy Poodle and a Maltese) are a popular breed due to their absolute adorableness and extreme cuddliness. These pups make excellent pets for adults and children alike, as they’re small, friendly, and playful....

Maltipoo dog near feeding bowl with dry food on floor in kitchen

Can Dogs Eat Pine Cones? Vet-Verified Facts, Risks & What to Do

Dogs are omnivorous animals, which gives us a bit of leeway in terms of extra treats we can feed them in addition to their regular dog formula. However, dogs sometimes take a fancy to weird things like non-edible bits and...

Can Dogs Eat Pine Cones

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.




Sign up for the Dogster Email Newsletter