Why Does My Dog Have Bad Breath? 5 Common Causes (And What You Can Do)

Does your dog's breath make you step back when they lean in for a cuddle?

While many people assume bad breath is just part of living with a dog, persistent bad breath (known as halitosis) is often a sign that something isn't quite right.

Dental disease is by far the most common cause, but it's not the only one. Diet, digestive health, chewing habits and even poop eating can all contribute to unpleasant-smelling breath.

Let's look at the most common causes—and what you can do to help.

1. Dental Disease – The Most Common Cause

If your dog has persistent bad breath, the first place to look is their mouth.

Plaque and tartar build-up allow bacteria to thrive around the teeth and gums. These bacteria produce volatile sulphur compounds, which are responsible for the unpleasant odour many guardians notice.

As dental disease progresses, dogs may also develop:

• Red or swollen gums

• Bleeding around the teeth

• Loose teeth

• Pain when chewing

• Infection

The good news is that good dental care can make a huge difference.

Feeding a fresh diet and providing regular appropriate recreational bones can naturally help reduce plaque build-up and support healthier teeth and gums.

👉 Read our Bone Blogs to learn how recreational bones can naturally support your dog's dental health.

2. Poor Diet and Nutrition

The food your dog eats doesn't just nourish them—it also feeds the bacteria living in their mouth and digestive tract.

Highly processed foods and diets high in refined carbohydrates (kibble) may encourage the growth of odour-producing bacteria.

Choosing a fresh, species-appropriate diet provides better nutrition and supports a healthier microbial balance throughout the body.

For a natural breath freshener, you can also offer small amounts of dog-safe herbs such as:

• Fresh basil

• Fresh mint

• Fresh fennel

These aromatic herbs may temporarily freshen breath while adding beneficial plant compounds to your dog's diet.

3. Gut Health – An Often Overlooked Piece of the Puzzle

Sometimes a dog's teeth appear reasonably healthy, yet their breath still isn't as fresh as it should be.

This is where gut health may be worth considering.

The digestive tract is home to trillions of beneficial bacteria that help digest food, produce nutrients and support the immune system. When this delicate balance becomes disrupted—a condition known as gut dysbiosis—dogs may experience digestive symptoms such as:

• Gas

• Loose or inconsistent stools

• Sensitive stomachs

• Food sensitivities

• Excessive tummy gurgling

Digestive disorders and gut imbalance can sometimes contribute to unpleasant breath, particularly when they occur alongside these digestive symptoms.

While gut health isn't the most common cause of bad breath, supporting the gut microbiome can be an important part of improving your dog's overall wellbeing.

Supporting a Healthy Gut

Supporting gut health starts with feeding a fresh, balanced and diverse diet and maintaining a healthy population of beneficial bacteria.

If your dog's bad breath is accompanied by digestive issues, the Multi-Strain Probiotic Blend may help support a balanced gut microbiome, normal digestive function and overall digestive health.

👉 Learn more about the Multi-Strain Probiotic Blend here: (insert product link)

Remember, probiotics aren't designed to "treat" bad breath—but by supporting digestive health, they may help if digestive imbalance is one of the contributing factors.

4. Poop Eating (Coprophagia)

It's not the nicest topic—but it's surprisingly common.

Dogs that eat faeces often develop temporary bad breath simply because of what they've eaten.

Coprophagia may be a behavioural habit, but it can also be associated with confinement, being punished for defecating indoors, lack of mental enrichment, or, occasionally, digestive or nutritional issues.

If your dog regularly eats faeces, it's worth discussing with an integrative veterinarian or qualified canine nutrition professional to determine whether there may be an underlying cause.

5. Underlying Health Conditions

Occasionally, bad breath can be a sign of a more serious medical condition.

Kidney disease, diabetes, liver disease, oral tumours and severe gastrointestinal disease can all change the smell of a dog's breath.

If your dog's bad breath develops suddenly, becomes extremely strong, or is accompanied by symptoms such as excessive thirst, vomiting, weight loss, drooling or difficulty eating, it's important to arrange a veterinary examination.

Fresh Breath Starts with Whole-Body Health

Fresh breath isn't simply about brushing teeth.

Healthy teeth and gums, a nutritious fresh diet, balanced gut health and regular veterinary care all work together to keep your dog healthy from the inside out.

If your dog's bad breath persists, start by checking their oral health. If their teeth and gums appear healthy but they're also experiencing digestive issues, supporting their gut microbiome with a quality probiotic could be another valuable piece of the puzzle.

At Aussie Pooch, we believe true health starts with whole-body wellness. That's why we focus on supporting both oral and digestive health through fresh nutrition, natural dental care and targeted gut support.

Looking to support your dog's dental health?

👉 Shop our Dental Health Collection

👉 Shop our Dental Treats

Because a healthy gut—and a healthy mouth—can both contribute to a happier, healthier dog.