Somewhere along the way "dog breath" became a joke rather than a symptom. It is one of the more expensive misunderstandings in pet ownership, because bad breath is not a quirk of being a dog. It is the smell of bacteria, and bacteria are what drive dental disease.
The reason it matters so much is timing. Dental disease runs through four recognised grades, and only the first one is fully reversible. Everything after that is management rather than cure. Knowing which grade you are looking at is the difference between a change of routine and a general anaesthetic.
What dental disease actually is
Plaque is a soft bacterial film that starts forming on teeth within hours of a clean. Left alone, minerals in saliva harden it into tartar within a couple of days, and tartar cannot be brushed off.
The real damage happens below the gum line. Bacteria work into the space between tooth and gum, the immune system responds with inflammation, and that inflammation gradually destroys the ligament and bone holding the tooth in place. That process is periodontal disease, and it is why a tooth that looks passable from the outside can still be failing.
The four grades
| Grade | What you can see | What is happening underneath | Reversible? |
|---|---|---|---|
| 1 - Gingivitis | A red or pink line along the gum margin, mild plaque, faint smell | Gum inflammation only. No bone loss yet. | Yes, fully, with brushing and a proper clean |
| 2 - Early periodontitis | Visible tartar, redder gums, gums starting to pull back, noticeable smell | Up to about a quarter of the attachment around the tooth lost | No. Progression can be halted, damage stays |
| 3 - Moderate periodontitis | Heavy tartar, clear gum recession, roots may be exposed, strong smell | Roughly a quarter to half of attachment lost. Some teeth loosening | No. Needs professional treatment |
| 4 - Advanced periodontitis | Loose or missing teeth, receded gums, pus, foul smell, sometimes facial swelling | More than half the attachment gone. Teeth failing | No. Extractions usually required |
Read that first row again, because it is the whole argument for acting early. At grade 1 you can genuinely undo it. One grade further along and you are into permanent damage.
What it does beyond the mouth
Two things, and the second gets less attention than it should.
Bacteria get into the bloodstream. An inflamed, infected mouth seeds bacteria into circulation every time the dog chews, which puts an ongoing load on the kidneys, liver and heart. The links are well established enough that vets treat dental disease as a systemic health issue rather than a cosmetic one.
It hurts, constantly. This is the part owners find hardest to accept, because their dog is still eating and still wagging. Dogs do not stop eating when their mouth hurts, they adapt. They swallow food whole, chew on one side, or lose interest in the toys they used to carry. Owners very often report that their dog seemed years younger after a dental, which tells you what it had been quietly putting up with.
Small breeds are at much higher risk
Selective breeding has given us a lot of dogs carrying a bigger dog's tooth count in a much shorter jaw. Crowded, rotated and overlapping teeth trap food and plaque in places a tongue cannot reach.
That covers most of the dogs Australians actually own now. Cavoodles sit at or near the top of the popularity lists year after year, and alongside them the Maltese, Miniature Dachshund, Miniature Schnauzer, Chihuahua and Yorkshire Terrier all share the same crowding problem. If that is your dog, assume dental disease is a matter of when rather than if, and start home care from puppyhood rather than waiting for a smell.
Greyhounds are the other group worth naming. Poor dental health is common in the breed, and it is one of the first things worth checking if you have adopted through a rehoming program.
When to book a vet check
Do not wait for a dog to stop eating. Book if you notice:
- Breath that makes you turn your head away
- Any visible yellow or brown build-up where tooth meets gum
- A red line along the gum margin
- Gums that bleed when you touch them, or when the dog chews
- Chewing on one side, dropping food, or swallowing kibble whole
- Pawing at the mouth or rubbing the face along the carpet
- A tooth that looks discoloured, chipped or loose
- Any lump or swelling on the jaw or under the eye
What a professional dental actually involves, and what it costs
Your dog goes under a general anaesthetic, because a conscious dog cannot be examined or cleaned properly below the gum line. The vet charts every tooth, usually takes dental radiographs to see the roots and bone, scales off the tartar above and below the gum line, extracts any teeth that cannot be saved, and polishes the rest to slow plaque re-adhering.
On cost, be prepared for a figure in the hundreds rather than the tens, and understand that the range is wide for a reason. A straightforward scale and polish on a grade 1 or 2 mouth sits at the bottom end. Add radiographs, multiple extractions, surgical extractions of a molar with three roots, pain relief and antibiotics, and it climbs quickly. Ask your vet for a written estimate with a best case and worst case, because the surgeon often cannot tell which extractions are needed until the dog is under and the images are up.
This is the part that makes prevention worth taking seriously. A tube of pet toothpaste is the cheapest veterinary spend you will ever make.
Check what your insurance actually covers
Worth doing before you need it. In Australia, routine dental work such as a scale and polish is generally not covered by pet insurance at all, and cover for dental illness is often an optional extra or restricted to higher tiers rather than included as standard. Some policies also require an annual dental check by a vet for dental cover to remain valid, and anything already present before the policy started will be treated as pre-existing and excluded.
Read the Product Disclosure Statement rather than the marketing page, and if dental cover matters to you, sort it out while the dog's mouth is still healthy.
One thing to be careful of
Anaesthesia-free dental cleaning scrapes visible tartar off the crowns. It cannot address anything below the gum line, which is where periodontal disease actually lives. It makes teeth look better without treating the disease, and it can leave owners falsely reassured that the problem has been handled. If a dog needs a dental, it needs a proper one.
The realistic prevention plan
Brush the teeth, ideally daily. Add a dental diet, dental chews or a water additive on top. Look in the mouth once a month and know what you are looking at. Have the vet check the teeth at the annual visit rather than only when something is obviously wrong.
Grade 1 is reversible. That is the whole reason to look tonight rather than next year.
