5 Signs of Dental Disease in Dogs (And What to Do About It)

Quick Answer

The five most common signs of dental disease in dogs are persistent bad breath, red or bleeding gums, visible tartar buildup or discoloured teeth, loose or missing teeth, and changes in eating or chewing behaviour. Dogs are experts at hiding pain, so by the time these signs show up, disease is often already underway. If you spot any of them, book a vet check - and pair that with a daily dental routine to help prevent it going forward.

Here's the uncomfortable truth: most dogs don't show obvious signs of dental disease until it's fairly advanced. Dogs instinctively mask pain and discomfort, so the mouth can be quietly deteriorating well before you notice anything's wrong. That's exactly why knowing the early warning signs - and acting on them - matters so much.

Written by the Bark Yeah team - Australian natural dog treat makers, hand-packing single-ingredient chews since day one.

1. Persistent bad breath

A bit of "dog breath" is normal. Bad breath that's sharp, sour or doesn't go away is not. Persistent halitosis is usually one of the earliest signs that bacteria is building up along the gumline, and it's often the first thing dog parents notice.

2. Red, swollen or bleeding gums

Healthy gums are firm and pale pink. Redness, swelling, or bleeding - especially when you gently lift your dog's lip to look - points to gingivitis, the earliest stage of periodontal disease. Caught here, it's genuinely reversible with the right care. Left alone, it progresses.

3. Visible tartar buildup or discoloured teeth

Tartar shows up as a hard, yellow-brown crust along the base of the teeth, usually most visible on the back molars. Teeth that look discoloured - grey, brown, or with visible staining - can also signal a problem. Worth remembering: white teeth don't automatically mean a healthy mouth, since a lot of dental disease happens below the gumline where you can't see it.

4. Loose, missing or fractured teeth

This is a sign of more advanced disease. As periodontal disease progresses, it breaks down the bone and tissue anchoring the tooth, eventually loosening or losing it entirely. Fractured teeth (from chewing something too hard, or an existing weak tooth) are also worth an urgent vet check, since exposed nerve tissue is genuinely painful.

5. Changes in eating or chewing behaviour

Watch for chewing only on one side, dropping food while eating, sudden disinterest in chews they used to love, pawing at the mouth, or excessive drooling. These are often the clearest behavioural clues that something in the mouth hurts - even if your dog isn't showing pain in an obvious way.

What to do if you spot these signs

See your vet first. None of the signs above can be reliably diagnosed or ruled out at home - a proper dental exam (and often x-rays under anaesthesia) is the only way to know what's actually going on beneath the gumline.

Build a daily prevention routine. Once any active issue is addressed, prevention is genuinely manageable day to day:

• Daily or regular chewing - mechanical chewing helps reduce plaque before it hardens into tartar. Curious whether it actually works? We break down the research on dental chew effectiveness here.
• Choose the right chew for your dog - texture and hardness matter. Our comparison of natural Australian Bully Sticks, Goat Horns, Kangaroo Tendons and Shark Cartilage breaks down which suits different dogs and chew styles.
• Brushing, where possible - still the gold standard alongside chews, even a few times a week helps.
• Regular vet checks - periodontal disease is largely silent, so routine checks catch what you can't see at home.

Browse our full Natural Dental Chews range, or try the Natural Dog Chews Bundle to build a rotation your dog actually looks forward to.

Frequently Asked Questions

What is the first sign of dental disease in dogs?
Red or bleeding gums (gingivitis) is typically the earliest visible sign, often alongside the start of persistent bad breath.

Can dental disease in dogs be reversed?
Early-stage gingivitis is usually reversible with proper care. Once periodontal disease progresses and affects the bone and tissue supporting the tooth, damage becomes permanent, which is why early action matters.

How common is dental disease in dogs?
It's extremely common - most dogs show some degree of dental disease by three years old, making it one of the most frequent health issues vets see, and one of the most preventable.

Can chews alone prevent dental disease?
Chews genuinely help by mechanically reducing plaque, but they work best alongside brushing and regular veterinary checks, not as a standalone solution.

When should I take my dog to the vet for dental issues?
As soon as you notice any of the five signs above - particularly bad breath that doesn't go away, visible gum changes, or a shift in eating behaviour. Don't wait for it to look severe; a lot of the damage happens before it's visibly obvious.

Sources: American Veterinary Dental College (AVDC) - Pet Periodontal Disease overview