Bad Breath in Dogs? It Signals Dental Disease—Recognize Symptoms & Protect Your Pet

Find out the causes, symptoms, and what you can do for your dog

Last Updated: February 19, 2026

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Dental disease in dogs is both more common and more impactful than you may think. Studies estimate that over 80% of dogs over the age of three have active dental disease. If left untreated, dental disease can lead to chronic pain, tooth loss, and systemic health problems affecting the heart, kidneys, and liver.

Over 80% of dogs over the age of three have active dental disease.

The most prevalent types of canine dental disease include gingivitis (inflammation of the gums), periodontitis (inflammation affecting deeper structures around the tooth), and eventually, bone and tooth loss.

Does Your Dog Have Dental Disease? Look For These Signs

Signs of dental disease in dogs may be subtle, as dogs are adept at hiding pain and discomfort. Common symptoms include: 

• Persistent bad breath (a sign of bacteria build up in the mouth)

• Visible tartar (look for brown or yellow build up on teeth)

• Red, swollen or bleeding gums

• Drooling

• Difficulty eating, perhaps favouring one side of the mouth or choosing to eat only soft food

• Pawing at the mouth

• Changes in appetite

• Irritability or lethargy

If you suspect your dog has dental disease, an oral examination by your vet is needed—professional dental cleaning under anesthesia may be recommended. Remember, dental disease not only causes pain and discomfort but impacts your dog’s overall wellbeing! Read more here.

Home Solutions for Plaque & Bad Breath in Dogs:

A Brush-Free Bad Breath Solution

Bid bad dog breath adieu with the Pet Dental Water Additive from Oxyfresh. Just add this brush-free solution for stinky breath, tartar, irritated gums, and cleaner teeth to your dog’s drinking water. Tasteless and odourless, it neutralizes bad-breath-causing sulfur compounds and destroys bacteria responsible for plaque and tartar buildup, helping prevent periodontal disease. ($18, oxyfresh.com)

A Tartar-Busting Chew

Give your dog a safe, healthy chew that also cleans their teeth! Made from just two food-grade ingredients, BetterBone’s teeth-cleaning nubs and ridges clean above the gum line and prevent the buildup of tartar, helping to stop bad breath and tooth decay in its’ tracks. (from $12, thebetterbone.com)

A Biofilm Disruptor

Other Half’s Doggie Dental probiotic powder delivers better oral health with a first-to-market, patent-pending Canine Oral-Health Postbiotic ingredient. Research-backed benefits include disrupting oral biofilms by 98%, preventing plaque and tartar, and reducing bad breath! Did we mention it’s bacon flavoured? ($40, otherhalfpet.com)

A Soothing Oral Gel

Oratene Enzymatic Brushless Oral Gel provides intensive care for inflamed gums and oral conditions like periodontal disease, thanks to its potent enzymes. The patented, antiseptic formula is flavourless—just spread on your dog’s gums, no brushing needed—to soothe and maintain gum health. ($13, zymox.com)

This article originally appeared in the award-winning Modern Dog magazine.
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