5 Warning Signs of Dental Disease in Pets (and What to Do Next)

Not sure if your pet’s mouth is healthy? Catching dental problems early can help prevent pain, tooth loss, and expensive procedures later. Below are five warning signs to watch for in both dogs and cats, plus practical next steps you can take at home.

Why dental disease matters

Dental disease often starts quietly: plaque builds up, hardens into tartar, and irritates the gums. Over time, that inflammation can progress to gum infection, loose teeth, and ongoing discomfort.

You might also notice mouth odour more at certain times—such as after exercise or on warm days when pets pant more—because smells can seem stronger when saliva dries on the tongue and gums. That doesn’t mean warm weather “causes” dental disease, but it can make existing issues more noticeable.

Many pets hide pain well. Rather than obvious yelps, you may see subtle changes like slower eating, less interest in toys, or a preference for chewing on one side. A small change that sticks around is worth paying attention to.

5 warning signs to look for

One sign alone doesn’t confirm a diagnosis, but several together usually mean it’s time to strengthen your home routine and book a professional dental check. If you’re unsure, take a quick photo (or a few) in good light so you can compare over time.

• 1) Persistent bad breath
  

  Occasional “food breath” happens. But a strong odour that keeps coming back—especially if it smells sour, metallic, or like rotting food—often points to plaque bacteria and gum irritation. If the smell returns quickly after drinking fresh water or chewing, it’s a good reason to check the gums and back teeth.

• 2) Red, swollen, or bleeding gums
  

  Healthy gums are usually a light pink, though many pets have naturally pigmented (darker) patches. Warning signs include a red line along the gum edge, puffiness, or bleeding when chewing or grooming. In cats, early gum inflammation can appear even when the teeth look relatively normal at first glance.

• 3) Yellow-brown tartar or “crust” on teeth
  

  Tartar commonly builds up along the gumline and on the back molars. If you can see a chalky yellow film or brown crust, it’s more than cosmetic: tartar creates a rough surface that holds bacteria close to the gums, making inflammation more likely to progress.

• 4) Changes in eating or chewing
  

  Watch for dropping kibble, chewing more slowly, turning the head to one side, avoiding harder treats, or suddenly preferring wet food. Some pets still finish meals but gulp food to avoid chewing—so behaviour during eating matters as much as appetite.

• 5) Pawing at the mouth, drooling, or facial sensitivity
  

  Extra drool, rubbing the face on carpet, pawing at the mouth, or pulling away when you touch the cheek can all suggest oral discomfort. These signs are especially important when they show up alongside gum redness, visible tartar, or ongoing mouth odour.

How to check your pet’s mouth safely

Pick a calm moment—after a walk, play, or dinner often works well. Keep it brief and gentle: lift the lip rather than opening the mouth wide, and aim for 10–20 seconds at a time. End the session before your pet becomes restless so mouth checks don’t become stressful.

Focus on three areas:

• the gumline (redness, swelling, bleeding)
• the tooth surface (tartar build-up, staining, obvious chips)
• breath (strong odour that persists)

If your pet is anxious, reactive, or in obvious pain, don’t force a mouth check. A gentle approach now makes it more likely you’ll be able to brush and handle the mouth in the future.

When to see a vet urgently: Seek prompt veterinary advice if you notice bleeding that won’t stop, facial swelling, sudden heavy drooling, a broken or loose tooth, discharge from the mouth, or your pet won’t eat or seems very distressed. These can indicate injury, infection, or severe pain that needs professional treatment.

What to use at home (daily and weekly)

Home dental care works best when it’s consistent and realistic. The main goal is to disrupt plaque before it hardens into tartar—small daily actions usually beat occasional “big clean-ups”.

• Toothbrushing basics
  

  A soft pet toothbrush (or finger brush) plus pet-safe toothpaste is the most effective at-home option for reducing plaque. Start by letting your pet lick a small amount of toothpaste, then gently brush the outside surfaces of the teeth in small circles—especially the back teeth where build-up is common.

• Dental chews and textured treats
  

  Chews can help mechanically reduce plaque for pets that won’t tolerate brushing. Choose the right size and firmness for your pet, supervise chewing, and replace chews when they become small enough to swallow.

• Water additives and oral gels
  

  These can support daily hygiene, particularly for older pets or cats who resist brushing. They’re best used as part of a routine rather than a stand-alone solution, and they may help reduce mouth odour and slow plaque build-up over time.

• Dental diets and feeding strategies
  

  Some pets benefit from diets designed to encourage chewing, or from feeding approaches that reduce fast gulping. If your pet swallows food whole, focus on brushing and appropriate chews rather than relying on kibble texture alone.

If you’re starting from scratch, keep it simple: choose a brush-and-paste set, then add one daily chew. Once your pet is comfortable, consider a water additive or gel for extra support.

Frequently Asked Questions

Is bad breath always a dental issue?

Not always, but it’s a common clue that plaque bacteria and gum inflammation may be present. If the smell is persistent, worsening, or paired with red gums, tartar, drooling, or changes in eating, organise a vet check.

My cat’s gums look red, but they still eat—should I worry?

Yes, it’s worth taking seriously. Cats often keep eating despite discomfort, and early gum inflammation can show up as a red gumline long before obvious tooth loss or weight changes.

Can I scrape tartar off at home?

It’s not recommended. Scraping can damage gums or tooth enamel and may cause pain or stress, especially if your pet jerks suddenly. Focus on brushing and supportive products to slow build-up, then book a professional dental assessment if tartar is visible.

Ready to start a simple routine? Explore our Dental Care range and stock up on daily essentials in Dental Care—and if you’re seeing multiple warning signs, chat to your vet.