Gingivite chez le chien

By Sarah Bennett, Certified Animal Nutritionist | Updated June 2026

If your dog's gums look red or swollen, or if their breath has taken a turn for the worse, you may be dealing with gingivitis — inflammation of the gum tissue caused by bacterial plaque. It is one of the most common health problems in domestic dogs, affecting the majority of adults over three years of age. The good news is that it is also one of the most treatable. Understanding what gingivitis is, how it differs from more serious dental disease, and exactly how to reverse it will put you firmly in control of your dog's oral health.

Gingivitis vs. Periodontitis: Understanding the Difference

These two conditions are often mentioned together, but they represent very different situations — and the distinction matters enormously for your dog's prognosis.

Gingivitis is inflammation confined entirely to the gum tissue (the gingiva). At this stage, the underlying bone and the periodontal ligaments that anchor the teeth in their sockets are completely intact. The damage is limited to soft tissue, which means it is 100% reversible with the right treatment. Catch it here, and your dog's mouth can return to normal.

Periodontitis, by contrast, occurs when the bacterial infection has spread beyond the gum line into the deeper supporting structures — the periodontal ligament, the alveolar bone, and the tooth root. Once bone loss begins, it cannot be undone. Periodontitis can only be managed and slowed, not reversed. Teeth may loosen and eventually require extraction. The chronic infection also places a systemic burden on the heart, kidneys, and liver over time.

This is precisely why catching gingivitis early is so critical. The window between reversible inflammation and irreversible bone destruction is the window you want to act in.

Signs of Gingivitis in Dogs

Healthy dog gums should be a consistent pale pink, firm, and smooth along the tooth line. Any deviation from this is worth noting. Common signs of gingivitis include:

• Red or purple gum line: The tissue immediately bordering the teeth becomes inflamed and darkens in colour, often appearing as a vivid red stripe where the gum meets the tooth.
• Swollen or puffy gums: The gum tissue may look raised or rounded rather than tight against the tooth surface.
• Bleeding: You may notice bleeding when your dog chews hard food or toys, or when you gently press on the gum line. Bleeding on gentle contact is a hallmark sign.
• Mild halitosis: The bacterial biofilm responsible for gingivitis produces volatile sulphur compounds. A persistently unpleasant mouth odour — beyond normal "dog breath" — is often the first thing owners notice.
• Oral sensitivity: Your dog may flinch, pull away, or snap when the mouth area is touched or examined.
• One-sided chewing: If one area of the mouth is more inflamed, dogs will often avoid it by chewing exclusively on the other side.

In early gingivitis, dogs often show no pain and continue eating normally, which is why regular visual checks of the mouth are so important.

What Causes Gum Inflammation?

The primary driver of gingivitis in dogs is plaque accumulation. Plaque is a sticky biofilm composed of bacteria, saliva proteins, and food debris that forms on tooth surfaces continuously. If not disrupted daily through brushing, it mineralises into tartar (calculus) within just a few days. Tartar is porous and rough — an ideal scaffold for more bacteria to colonise. As the bacterial load at the gum line increases, the immune system mounts an inflammatory response, producing the redness and swelling we recognise as gingivitis.

Several secondary factors can accelerate or worsen this process:

• Medications: Certain drugs, including cyclosporine (used for immune suppression) and some calcium channel blockers, can cause gingival overgrowth or increase susceptibility to inflammation.
• Immune system conditions: Dogs with compromised immunity may develop more severe or rapidly progressing gingivitis.
• Breed predisposition: Small and toy breeds (Chihuahuas, Yorkshire Terriers, Maltese) have teeth that are proportionally too large for their jaws, leading to crowding and overlapping that trap plaque. Brachycephalic breeds — Bulldogs, Pugs, French Bulldogs — face similar crowding due to compressed skull anatomy. Both groups require more vigilant dental care from an early age.

The Good News: Gingivitis Is Reversible

The biology of reversal is straightforward. Tartar provides the scaffolding and the ongoing source of bacterial challenge to the gum tissue. Remove the tartar completely — including the deposits below the gum line where home brushing cannot reach — and you eliminate the primary source of inflammation. With the bacterial load gone and plaque kept under control through daily home care, the gum tissue has everything it needs to regenerate to normal health.

Most dogs show a visible reduction in gum redness and swelling within one to two weeks of a professional cleaning, and complete tissue recovery typically occurs within two to four weeks, provided daily plaque control is maintained at home. This is a genuinely encouraging timeline — and achievable for the vast majority of dogs.

How to Reverse Gingivitis Step by Step

Reversing gingivitis requires a two-pronged approach: professional removal of existing tartar, followed by consistent home care to prevent it from returning.

Step 1 — Professional scaling and polishing under anaesthesia. This is non-negotiable. Only a veterinary dental cleaning under general anaesthesia allows complete removal of tartar above and below the gum line. Anaesthesia-free cleanings remove only visible surface deposits and leave subgingival tartar untouched — where the most harmful bacteria reside. A thorough cleaning will also include probing each tooth pocket and dental radiographs to confirm no underlying bone loss is present.

Step 2 — Begin daily toothbrushing within days of professional cleaning. Start as soon as your dog is comfortable post-procedure. Use a soft-bristled toothbrush and an enzymatic toothpaste formulated for dogs. Enzymatic toothpastes work even without vigorous scrubbing — the enzymes continue breaking down plaque after you finish brushing. Aim to cover all tooth surfaces, paying particular attention to the gum line and back molars.

Step 3 — Add VOHC-approved supplements. The Veterinary Oral Health Council (VOHC) independently tests dental products and awards its seal only to those with proven plaque and tartar control. VOHC-approved water additives (such as Oxyfresh or TropiClean Fresh Breath) and dental chews (Greenies, Veggiedent) can be used alongside brushing as additional layers of protection — not as replacements for it.

Step 4 — Schedule a recheck in four to six weeks. Your vet should confirm that gum tissue has returned to normal and that no pockets have developed. This visit is brief but important — it closes the loop on treatment and catches any outlier cases that need further intervention.

Products That Support Gum Recovery

When choosing dental products, the VOHC seal is your most reliable quality indicator. Well-regarded options in each category include:

• Enzymatic toothpaste: Virbac C.E.T. Enzymatic Toothpaste — available in dog-friendly flavours, the dual-enzyme system provides ongoing antibacterial activity between brushing sessions.
• Dental chews: Greenies and Veggiedent both carry VOHC approval. Choose the size appropriate to your dog's body weight, and supervise chewing to ensure safe consumption.
• Water additives: Oxyfresh Pet Dental Water Additive and TropiClean Fresh Breath are popular VOHC-approved choices. Simply added to the drinking bowl daily, they reduce bacterial counts in the mouth throughout the day.

Preventing Recurrence

Once gingivitis is resolved, keeping it gone requires ongoing commitment — but not enormous effort. The single most effective preventive measure is daily toothbrushing. Studies consistently show that brushing once daily reduces plaque accumulation by over 60% compared to no brushing. Even three to four times per week provides meaningful benefit, though daily remains the gold standard.

Beyond home care, scheduling professional cleanings at regular intervals is essential. For predisposed breeds — small, toy, and brachycephalic dogs — veterinary guidance typically recommends a professional cleaning every six to twelve months. For dogs with lower genetic risk and excellent home care compliance, every one to two years may be sufficient. Your veterinarian can advise the right interval based on your individual dog's history and anatomy.

Finally, make a habit of checking your dog's gum colour at least once a week. The few seconds it takes to lift the lip and scan the gum line can reveal early redness before it progresses. Pale pink, firm, and flush against the teeth is what you are looking for. Any persistent redness or swelling warrants a veterinary assessment sooner rather than later.

Gingivitis is a warning your dog's mouth sends before more serious damage begins. The fact that it is fully reversible is genuinely good news — and with the steps outlined here, most owners can resolve it and keep it resolved with consistent, straightforward care.

Sarah Bennett is a Certified Animal Nutritionist with over 12 years of experience in companion animal health and nutrition.