Gum disease in dogs

Gum disease is one of the most common health issues in dogs and usually starts with plaque build-up on the teeth. Over time, this can lead to gingivitis (inflamed gums) and, if left untreated, progress to periodontal disease, which can permanently damage the gums, tooth roots, and supporting bone.

Most dogs will hide discomfort, so dental disease often goes unnoticed until it’s more advanced. That’s why regular dental checks and daily care are so important.

Looking after your dog’s teeth is part of looking after their overall health, along with making sure you have the right dog insurance in place for peace of mind.

What is gum disease in dogs?

Gum disease (periodontal disease) is a progressive condition affecting the gums and structures that support the teeth.

It typically starts when plaque (a soft film made of bacteria, saliva, and food debris) builds up on the teeth. If not removed, it hardens into tartar (calculus), which irritates the gums and triggers inflammation.

This early stage is called gingivitis and is reversible. If it progresses, it becomes periodontal disease, where deeper structures such as the ligaments and bone around the teeth are damaged. At this stage, damage is permanent.

Causes of gum disease

The main cause of gum disease in dogs is plaque build-up on the teeth and along the gum line.

Some common contributing factors include:

• Infrequent or no tooth brushing
• Natural bacterial build-up in the mouth
• Ageing (risk increases as dogs get older)
• Crowded or misaligned teeth
• Breed predisposition (especially small and brachycephalic breeds)
• Retained baby teeth in younger dogs
• Lack of routine dental care and vet checks - vets consistently highlight poor oral hygiene as the biggest preventable factor.

Commonly affected breeds

Any dog can develop gum disease, but it’s more common in certain breeds. This includes:

• Small and toy breeds (due to crowded teeth), such as Chihuahuas, Yorkshire Terriers and Pomeranians.
• Brachycephalic breeds (flat-faced dogs with misaligned teeth), such as Pugs, French Bulldogs and English Bulldogs.
• Older dogs of any breed. This is mainly due to tooth crowding and reduced natural cleaning from chewing behaviour.

Types of gum disease in dogs

Gum disease in dogs develops in stages, starting with mild inflammation and potentially progressing to more serious and irreversible damage if it’s not treated.

Symptoms of gum disease

Dogs often continue eating despite dental pain, so symptoms can be subtle. Look out for things like:

• Bad breath (often the earliest sign)
• Red or swollen gums
• Bleeding gums
• Yellow or brown tartar on teeth
• Drooling more than usual
• Chewing on one side of the mouth
• Dropping food or difficulty eating
• Reduced appetite or weight loss
• Loose teeth (more advanced cases)
• Behaviour changes such as irritability

What to do if your dog shows signs of gum disease

If you notice any of the above signs, it’s best to arrange a vet appointment rather than waiting to see if things improve. In the early stages, such as gingivitis, your vet may be able to help stabilise the condition with a professional dental clean and a tailored at-home care routine. This is often enough to prevent progression if it’s caught early.

If the disease has already advanced, your vet may recommend further investigation, such as dental X-rays, to assess what’s happening below the gum line. From there, treatment can be planned properly - whether that’s deep cleaning, extractions, or managing infection and pain.

The key thing to remember is that gum disease doesn’t reverse on its own. The earlier it’s picked up, the easier it is to manage and the less likely it is to cause long-term damage.

What age could you expect gum disease in your dog?

Gum disease can start surprisingly early. Plaque can begin forming within days of cleaning, and signs of gingivitis can appear in young adult dogs.

Periodontal disease is more common in middle-aged and older dogs.
By around 3-5 years old, many dogs already show some degree of dental disease if no preventive care is in place.

How to manage gum disease in dogs

Managing gum disease in dogs is all about slowing or stopping it from getting worse. The most effective approach is daily tooth brushing, alongside regular vet dental checks, often once a year, and professional cleaning when your vet recommends it.

Dental chews or toys designed to help reduce plaque can also be useful, but they should never replace brushing. A balanced diet that supports oral health can make a difference too, along with keeping an eye out for early signs such as bad breath or red gums. 
Once periodontal disease has developed, it can’t be reversed, only managed to prevent further damage.

Does pet insurance cover gum disease?

Some pet insurance policies may cover dental treatment, but this usually comes with conditions.

For example, Agria’s lifetime dog insurance includes cover for dental illness and injury, but there are restrictions. It doesn’t cover routine check-ups, including descaling and polishing, or elective and cosmetic treatments. Certain procedures such as crowns and root canal treatments are also excluded, although there are some exceptions.

For full details, always check your policy wording carefully, or contact the claims helpline if you’re unsure whether a treatment is covered.

Gum disease treatment options

Treatment depends on how advanced the disease is, and the aim is always to stop pain, remove infection, and prevent further damage.
If caught early, your vet will usually recommend a professional dental clean under anaesthetic. This allows full removal of plaque and tartar both above and below the gum line, which simply isn’t possible at home. The teeth are then polished to help slow future build-up.

When disease is more advanced, your vet may take dental X-rays to assess the health of the tooth roots and surrounding bone. This is important because a lot of dental disease happens below the gum line where it can’t be seen.

If teeth are loose, infected, or causing ongoing pain, extraction may be recommended. Although this can sound worrying, most dogs recover well and often feel significantly more comfortable once the source of the pain is removed.

In some cases, your vet may also prescribe pain relief and, where necessary, antibiotics to help manage infection. These are usually supportive rather than a long-term solution.

When to speak to a vet

Dental disease can be easy to miss because dogs rarely show obvious signs of pain straight away. That’s why small changes often matter more than dramatic ones. If you notice persistent bad breath that doesn’t improve with brushing or dental care, it’s often one of the earliest warning signs that something is developing. Red or inflamed gums are another key signal, even if your dog is otherwise behaving normally.

You should also speak to your vet if your dog starts eating differently. For example, chewing on one side, taking longer to finish meals, or becoming reluctant with harder foods or chew toys. These subtle changes are often linked to oral discomfort.

More obvious signs such as visible tartar build-up, bleeding gums, loose teeth, or swelling around the face or jaw should always be checked promptly, as they usually indicate more advanced disease.
And if your dog seems generally uncomfortable, such as pawing at their mouth, becoming irritable, or going off their food, it’s important not to wait. Dental pain can be significant even when it isn’t obvious from the outside.

As a general rule, if something about your dog’s mouth doesn’t look or feel right, it’s always better to get it checked early. The sooner dental disease is addressed, the easier it is to manage and the better the outcome for your dog.