Eewwwww! Dog Breath!!

Published on 11 September 2026 at 11:05

Smelly Dog Breath? How to Keep Your Dog’s Mouth Fresh and Healthy

We love our dogs, but sometimes their kisses come with a little more fragrance than we'd like!

While your dog's breath isn't expected to smell minty fresh, particularly unpleasant or persistent bad breath shouldn't simply be accepted as part of owning a dog. In fact, bad breath — also known as halitosis — can sometimes be one of the first signs that something isn't quite right with your dog's teeth, gums or general health.

The good news is that there are plenty of simple things owners can do to support their dog's dental health and help keep those doggy kisses a little fresher.

What causes bad breath in dogs?

One of the most common causes of bad breath is a build-up of plaque and tartar around the teeth. Over time, this can irritate the gums and contribute to dental disease, infection and discomfort. According to the PDSA, dental disease is the most common cause of bad breath in dogs.

However, what your dog eats can also affect the smell of their breath. A fish-based diet, for example, may naturally leave their breath smelling a little fishier.

Occasionally, persistent bad breath can be caused by something else, such as an object stuck in the mouth, an infected tooth or another health problem. That's why a sudden or significant change in your dog's breath is worth paying attention to.

Make tooth brushing part of their routine

Regular tooth brushing is one of the most effective things you can do to support your dog's dental health.

Plaque begins to accumulate on the teeth and, if it isn't removed, can eventually harden into tartar. Brushing helps physically remove plaque before it has the chance to build up.

Ideally, aim to brush your dog's teeth every day. If your dog isn't used to having their teeth brushed, don't expect them to accept it immediately. Introduce the process gradually.

Start by getting them comfortable with you touching around their mouth and gums. You can then introduce some dog-safe toothpaste before progressing to a finger brush or dog toothbrush. Keep sessions short and positive, using plenty of praise.

Most importantly, always use toothpaste specifically designed for dogs. Human toothpaste isn't suitable for them.

Give them something appropriate to chew

Chewing can provide more than entertainment.

Appropriate dental chews and dental toys can help mechanically clean the surface of the teeth while your dog chews. They're particularly useful alongside regular brushing rather than as a complete replacement for it.

Choose chews that are appropriate for your dog's size and chewing style and always supervise them.

Be cautious with extremely hard items. Bones, stones and other very hard objects can potentially fracture teeth, and cooked bones can splinter and cause serious problems.

Keep their water bowl fresh

Fresh water isn't just important for keeping your dog hydrated.

Food particles and bacteria can quickly build up inside water and food bowls, particularly if they're left for several days without being properly washed.

Give your dog access to clean, fresh drinking water throughout the day and make washing their food and water bowls part of your regular routine.

It's one of the simplest habits you can introduce — and it's good general hygiene too.

Take a look inside their mouth

You don't need to be a vet to get into the habit of checking your dog's mouth.

Every so often, gently lift their lips and take a look at their teeth and gums.

Healthy gums should generally look clean rather than very red, swollen or bleeding. Keep an eye out for yellow or brown tartar, broken teeth, loose teeth or anything unusual inside the mouth.

The PDSA recommends regularly checking your dog's teeth, gums and breath, ideally alongside their tooth-brushing routine.

Getting your dog used to having their mouth handled can also make future dental checks much easier.

Think about their diet

What goes into your dog's mouth will naturally influence what comes out of it!

Some foods have stronger smells than others, and certain diets may make your dog's breath smell different without there necessarily being a problem.

A complete, balanced diet is important for your dog's overall health. If their breath suddenly changes after changing foods, consider whether their new diet could be contributing.

Dry food may provide a small amount of mechanical cleaning as a dog chews, although it shouldn't be considered a substitute for brushing.

Don't just try to cover up the smell

When your dog has bad breath, it's tempting to simply look for something that makes their breath smell better.

However, freshening the smell without considering why it's there can hide the real problem.

Think of bad breath as information.

If your dog's breath suddenly becomes noticeably worse, check their mouth and monitor them for other changes rather than simply trying to mask the smell.

And never use human mouthwash or other human dental products on your dog. There are dog-specific dental products available, and your vet can advise which options may be suitable.

Keep up with regular veterinary dental checks

Even with a great home routine, veterinary dental checks remain important.

Dogs can be surprisingly good at hiding dental discomfort and may continue eating even when they have painful teeth or gums. Regular checks give your vet an opportunity to spot problems before they become more serious.

A professional dental examination may also identify problems that aren't obvious just from looking at your dog's teeth at home.

When does smelly dog breath need a vet?

If your dog's breath suddenly becomes very unpleasant or remains persistently bad, it's worth speaking to your vet.

Pay particular attention if the bad breath appears alongside red or bleeding gums, excessive drooling, difficulty eating, dropping food, chewing on only one side, pawing at the mouth, facial swelling, reduced appetite or obvious discomfort. These can all be signs of dental or oral problems.

Unusual smells can occasionally provide another clue. For example, PDSA notes that certain medical conditions can change the smell of a dog's breath, including kidney disease and diabetes.

So if you're concerned, don't simply put strong-smelling breath down to your dog getting older — have it checked.

Small habits can make a big difference

Keeping your dog's mouth healthy doesn't have to involve a complicated routine.

Regular tooth brushing, appropriate chewing, fresh drinking water, clean bowls and simply getting into the habit of checking your dog's mouth can all contribute to better dental hygiene.

Most importantly, get to know what's normal for your dog.

That way, if their breath, teeth, gums or eating habits suddenly change, you're much more likely to spot it early.

Because freshening their breath isn't really about making their kisses smell nicer — it's about helping keep the dog behind those kisses happy and healthy for as long as possible.

Apple Patch Pet Care — supporting your dog's wellbeing from their first adventures to their golden years.

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