Every year, over 12% of all dogs in Australia will have some kind of digestive issue. It’s one of the most common issues we are faced with as dog parents. From occasional diarrhoea to frequent vomiting, excessive gas, or loose stools, it's something we are all familiar with in our dogs. 

If your dog seems to react badly to certain foods, often has an upset tummy, or is sick quite often, you may be wondering whether they have a sensitive stomach. So what causes sensitive stomachs in dogs, and what can you do to help your dog?

What Is a Sensitive Stomach in Dogs?

A “sensitive stomach” isn’t a medical diagnosis; it's a term used to describe dogs who seem to have more sensitive digestive systems than others, and, in all honesty, it’s not even always related to their stomach—it often refers to their whole digestive tract. 

Some dogs can eat almost anything, almost constantly and never have as much as a whiff of digestive upset. We all hear stories of “my dog ate ‘xyz’ all the time, and he was fiiiine.” But unfortunately thats not the case for most dogs. And fr many dogs, symptoms of a sensitive stomach manifest very easily due to small dietary changes, stressful situations, rich treats, or unfamiliar foods.

The severity of a “sensitive stomach” can range widely, from occasional mild upset to chronic, ongoing problems that need lifelong management. 

Common Signs of a Sensitive Stomach in Dogs

Dogs with digestive sensitivity, or a sensitive stomach, may experience a variety of symptoms, including:

• Loose stools or diarrhoea

• Vomiting

• Excessive gas

• Stomach gurgling

• Eating grass regularly

• Loose or inconsistent stools

• Reduced appetite

• Digestive upset after treats or new foods

Some dogs experience occasional flare-ups, while others struggle with more persistent digestive problems.

Because symptoms can overlap with other health conditions, it’s important to speak to your vet if you have any concerns about your dog’s digestive health.

What Causes Sensitive Stomachs in Dogs?

It’s difficult to define a single cause behind sensitive stomachs in dogs, as so many things may contribute to it, but here are some common causes. 

Dietary Changes

Have you recently changed your dog’s food? Rapid transitions onto new foods can disrupt the balance of bacteria in the gut, and throw out the established levels, which can lead to diarrhoea, digestive discomfort, and gas. Always transition your dog onto new food slowly, over a period of 7-10 days. 

Food Intolerances

Some dogs struggle to digest certain ingredients or proteins in their food, just as humans can have intolerances such as dairy. These aren’t true “allergies” but are still capable of causing digestive upset. Common intolerances are: 

• Beef

• Chicken

• Dairy

• Wheat.
  

Stress and Anxiety

The digestive system and nervous system are closely connected. Stressful events such as boarding, travel, changes in routine, or separation anxiety can sometimes trigger digestive upset, in the same way it can for us.

Gut Microbiome Imbalance

Your dog’s digestive tract contains billions of microorganisms, collectively known as the gut microbiome. These bacteria play an important role in digestion, immune function, and gut health.

Disruption to the balance of beneficial bacteria may contribute to digestive upset in some dogs. Lots of things can upset the balance of bacteria in the microbiome, and it’s important to get it back in balance quickly to keep your dog comfortable.

Antibiotics and Medication

Antibiotics are a vital tool in your vet’s arsenal, and your dog will no doubt need them at some point in their life. They are designed t kill off the “bad” backteria your dog’s body is trying to fight, and although they do an incredible job, they also kill of much of the “good bacteria” your dog carries with it too. With this devastation, or “microbiome collapse”, often comes diarrhoea, or stool changes. The same can be said for other medications, such as NSAIDs or steroids. Despite not killing off bacteria, they can disrupt the microbiome balance, with the same results. 

Eating Things They Shouldn’t

Dogs are enthusiastic scavengers. If they can get their jaws around it, they will. Eating off food, rich food, toxic foods, ot table scra[ps can all quickly trigger a reaction from your dog’s digestive system. 

Underlying Health Conditions

In some cases, chronic digestive problems may be linked to underlying medical conditions, parasites, or food-related disorders that require veterinary investigation.

Acute vs Chronic Digestive Upset in Dogs

Understanding whether your dog’s symptoms are long-term or short-term will help you decide what support they need. It is always recommended to speak to your vet whenever your dog has any change to their gut health.

Acute Digestive Flare-Ups in Dogs

Acute means sudden or short-term periods of digestive upset.

Common triggers include:

• Eating something unusual

• Sudden food changes

• Stress

• Rich foods

• An infection

• A response to a sensitivity

• Mild stomach irritation

Symptoms may include temporary diarrhoea, vomiting, or reduced appetite. A supplement to provide a gut ‘reset’ and intensive, targeted support may be useful during these periods. 

Chronic Sensitive Stomachs

Chronic conditions are long-term or recurring problems that persist over weeks, months, or even years.

Signs may include:

• Frequent loose stools

• Ongoing gas

• Regular stomach noises

• Intermittent vomiting

• Reactions to certain foods

• Poor tolerance to dietary changes

In these dogs, long-term digestive support is helpful to ensure long-term gut health.

What to Feed a Dog With a Sensitive Stomach

Diet plays a major role in digestive health. Although yout dog may not have a true allergy to a food, you may find they are sensitive to certain foods, and discussing a diet plan with yout vet is vital if you have concerts. However, it is important to consider your dog’s diet even if you do not think they have an allergy, but if they have a tummy upset or a sensitive stomach. 

Dogs with sensitive stomachs often do better with:

• Consistent feeding routines

• Highly digestible foods

• Gradual dietary transitions

• Moderate fat levels

• Simple ingredient diets

During acute flare-ups, veterinarians may sometimes recommend bland, easily digestible meals for short-term support, along with a supplement to support the microbiome.

When Should You See a Vet With A Dog With A Sensitive Stomach?

Occasional mild digestive upset is relatively common in dogs, but persistent or severe symptoms should never be ignored.

We recommend you speak to your vet whenever you notice a change in your dog’s health ot behaviour. However, it becomes urgent to contact your veterinarian if your dog has:

• Persistent diarrhoea

• Frequent vomiting

• Blood in the stool

• Weight loss

• Severe lethargy

• Ongoing poor appetite 

• Sudden worsening of symptoms

• Repeated digestive flare-ups

Please seek immediate veterinary attention in these cases. Digestive symptoms can also sometimes indicate underlying medical conditions that require proper diagnosis and treatment.

Can Supplements Help Dogs With Sensitive Stomachs?

Because gut health is often so complex, with no easy-to-define cause and varying symptoms, one of the best ways to support your dog is to keep their digestive system as healthy as possible and help to maintain a balanced microbiome. 

With research advancing every day in gut health, digestive support supplements are becoming increasingly popular to maintain long-term gut health and support dogs during flare-ups or periods of upset. 

The goal is not to “treat symptoms,” but to support overall gut health, resilience, and digestive balance. A daily gut health supplement is recommended, with the back up of an intenstive reset support for time when they need extra care. Look for supplements containing probiotics for dogs, as well as prebiotics and ingredients that support both the microbiome and the gut lining itself. 

Learn more about probiotics for dogs here.

Supporting Dogs During Acute Digestive Flare-Ups

If your dog develops a sudden digestive upset, it’s important to speak to your vet as soon as possible. Supportive care is then often important once the vet has treated the core of the problem.

Depending on the situation, this may include:

• Providing fresh water

• Feeding small, bland meals

• Avoiding rich treats

• Allowing the digestive system to settle

• Monitoring symptoms closely

• Using digestive support supplements specifically formulated for periods of digestive upset.

Symbiol™ 14-Day Gut Protocol for dogs with sensitive stomachs

Sometimes your dog will need intensive gut support, particularly if they’re on antibiotics or medication, or have had an acute period of digestive upset. Symbiol™ 14-Day gut protocol is scientifically formulated to support dogs during this time of need. Going beyond basic probiotics, it combines antibiotic-resilient Bacillus clausii, New Zealand colostrum, and targeted nutrients to help rebalance the microbiome, support gut lining repair, and stabilise digestion during and after treatment.

An intensive gut reset, delivered as a clear 14-day protocol—helping restore stool quality and keep your dog comfortable and supported throughout their recovery.

Long-Term Support for Dogs With Chronic Sensitive Stomachs

For dogs with ongoing digestive upset or sensitive stomachs, supporting their lifelong gut health is key to daily comfort, and may help reduce the frequency of flare-ups.

Helpful strategies may include:

• Feeding a consistent diet

• Avoiding known triggers

• Introducing dietary changes gradually

• Maintaining regular routines

• Supporting gut health with a daily supplement

• Monitoring stool quality and symptoms.

Symbiol™ Daily Gut Balance For Ongoing Sensitive Stomach Support

Because the gut microbiome can be influenced by stress, diet, medication, and environment, supporting long-term gut health is vital to your dog’s daily comfort. Feeding your dog a scientifically formulated gut supplement helps maintain digestive resilience throughout their life. 

Symbiol™ Daily Gut Balance is a science-backed, multi-action supplement designed for everyday use to support gut health from the inside out. It combines resilient Bacillus probiotic strains, an advanced New Zealand Honeydew Honey prebiotic, and targeted nutrients to help stabilise the microbiome, strengthen the gut lining, and support digestion—creating a balanced and resilient gut. 

Symbiol™ Is Coming Soon!

Does your dog’s gut need some love and attention? Symbiol™ Daily Gut Balance and Symbiol™ 14-Day Gut Protocol are launching soon! Sign up for the waitlist here and be the first to hear all the updates and get your paws on the good stuff!

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Frequently Asked Questions

Why does my dog have a sensitive stomach?

Gut sensitivity can be influenced by diet, stress, food intolerances, gut microbiome imbalance, medications, or underlying health conditions.

Can probiotics help dogs with sensitive stomachs?

Probiotics may help support digestive balance and healthy gut bacteria in dogs, particularly those with digestive sensitivity or loose stools.

What food is easiest for dogs to digest?

Highly digestible diets with consistent ingredients are often easier for sensitive dogs to tolerate.

Can stress upset a dog’s stomach?

Yes. Stress and anxiety can affect the digestive system and may trigger diarrhoea or digestive upset in some dogs.

Should dogs with sensitive stomachs avoid treats?

Some dogs tolerate treats well, while others may react to rich or unfamiliar foods. Moderation and consistency are often helpful.