Plaque starts forming on a dog's teeth within hours of eating, the same way it does in humans. Left alone, it hardens into tartar within a few days, and tartar can't be brushed away, only removed professionally. Over 80% of dogs over the age of three show some degree of periodontal disease, and it's one of the most common health issues vets see in dogs of any breed or size.
This isn't just a cosmetic or bad-breath issue. Untreated dental disease leads to painful tooth loss, gum infection, and in more advanced cases, bacteria from the mouth entering the bloodstream and affecting organs like the heart and kidneys. Regular brushing is the single most effective thing an owner can do at home to slow that progression, and it's considerably cheaper and less stressful for your dog than a series of professional cleanings under anesthesia.
You don't need much, but what you use matters.
A dog-specific toothbrush works best, either one with a long angled handle, a dual-headed brush, or a finger brush that slips over your fingertip, which many dogs tolerate better at first. A soft-bristled human baby toothbrush can work in a pinch for smaller dogs.
Toothpaste has to be made specifically for dogs. Pet toothpaste comes in flavors dogs actually like, poultry, beef, malt, mint, which makes the whole process easier. Never use human toothpaste. It's typically not meant to be swallowed and can contain ingredients like xylitol that are toxic to dogs. Baking soda is also off the list, since it's not designed to be swallowed and can upset a dog's stomach.
Beyond that, all you need is a quiet space, a bit of patience, and treats for positive reinforcement along the way.
Jumping straight to a toothbrush is the fastest way to make a dog hate the whole process. A gradual introduction over a few weeks makes a real difference in whether brushing becomes a normal part of your dog's routine or a fight every time.
Week 1: Get your dog comfortable with you touching their mouth. Gently lift their lips and touch their teeth and gums with your finger for a few seconds each day, following with praise and a treat. No toothpaste yet, this is purely about building tolerance for the handling.
Week 2: Introduce the taste of pet toothpaste. Let your dog lick a small amount off your finger so they associate the flavor with something positive, then move to rubbing a bit of toothpaste on their teeth and gums with your finger or a soft cloth, using gentle back-and-forth motions.
Week 3: Introduce the toothbrush itself. Let your dog sniff and lick it first, then apply toothpaste and gently brush a few teeth at a time, gradually working up to the full mouth. By the end of this week, most dogs will tolerate a real brushing session.
If your dog is resistant at any stage, slow down rather than pushing forward. It's better to spend an extra week on a step than to create a negative association that undoes your progress.
Once your dog is ready, here's the actual process.
Position your dog comfortably, in your lap if they're small, sitting or standing beside you if they're larger. Gently lift the lips on one side to expose the teeth, keeping your dog's mouth mostly closed rather than prying it wide open. For the lower teeth, tilt your dog's head back slightly while holding the upper jaw steady.
Apply a small pea-sized amount of pet toothpaste to the brush. Focus primarily on the outer surfaces of the teeth, especially the large cheek teeth and canines, where plaque builds up fastest. You can generally skip the inner surfaces, since your dog's tongue naturally removes a good amount of plaque there on its own.
Brush in small circular or back-and-forth motions along the gumline, where plaque accumulates most, spending roughly 30 seconds per side of the mouth. You don't need to scrub hard, gentle and consistent contact does the work. Finish with praise and a reward every time, so your dog continues to associate the process with something positive rather than something to tolerate.
Daily brushing is the gold standard, and it's what most veterinary dentists recommend if you can manage it. Plaque hardens into tartar within roughly 24 to 72 hours, so daily brushing catches it before it has the chance to set.
If daily isn't realistic for your household, aim for a minimum of three times a week. Anything less than that allows meaningful tartar buildup between sessions, which reduces how effective brushing can be at preventing disease. Consistency matters more than perfection, a routine you can actually stick to beats an ambitious schedule you abandon after two weeks.
Some dogs resist no matter how gradual the introduction. If that's the case, don't force it, since a struggle every session will make things worse over time, not better.
Go back a step in the introduction process and slow down further than you think you need to. Try a different toothbrush style, some dogs tolerate a finger brush far better than a handled one. Change the time of day, right after a walk or a play session when your dog is naturally more relaxed often works better than first thing in the morning. And keep sessions short, even 10 to 15 seconds of actual brushing is progress if it's what your dog can currently handle, and you can build up gradually from there.
If your dog genuinely cannot tolerate brushing even with patience and time, that doesn't mean dental care is off the table, it means leaning more heavily on the alternative products below and staying on top of professional exams.
Brushing is the most effective tool, but it doesn't have to work alone. Dental chews formulated to reduce plaque and tartar can help between brushings, though they're a supplement, not a replacement. Water additives designed to reduce bacteria in the mouth are an easy add-on for dogs who tolerate having something in their water bowl changed. Dental diets, specially formulated kibble with a texture designed to scrape the teeth as a dog chews, can help for dogs who are difficult to brush. Look for products carrying the Veterinary Oral Health Council (VOHC) seal, which indicates the product has actually been tested and shown to reduce plaque or tartar, rather than just marketed as dental-friendly.
Brushing is prevention, not treatment. Certain signs mean it's time for a veterinary exam rather than more diligent brushing at home.
Watch for persistent bad breath that doesn't improve with regular brushing, visible tartar buildup (a yellow-brown crust along the gumline), red or bleeding gums, a dog pawing at their mouth or dropping food while eating, visible loose or broken teeth, and any reluctance to eat or chew on one side of the mouth. Any of these point to a problem that's already progressed past what brushing alone can address, and catching it early with a professional exam is far less invasive and less costly than waiting.
No. Human toothpaste isn't meant to be swallowed and can contain ingredients like xylitol that are toxic to dogs. Always use a toothpaste made specifically for pets.
It's never too late to start, though older dogs may need a longer, more gradual introduction period. If your dog already has significant tartar buildup, a veterinary exam before starting a home routine is a good idea.
About one to two minutes total for the full mouth, roughly 30 seconds per side, once your dog is comfortable with the process.
No. They help reduce plaque between brushings but aren't a substitute for regular brushing or professional cleanings.
Minor bleeding can happen occasionally, especially if gums are already inflamed, but persistent or heavy bleeding is a sign to schedule a veterinary exam rather than continuing to brush through it.
Brushing your dog's teeth isn't complicated, but it does take patience, the right supplies, and a gradual approach that respects your dog's comfort level. Done consistently, it's one of the most effective things you can do for your dog's long-term health, and it can meaningfully reduce how often they need professional dental work down the road.
If you're not sure where your dog's dental health currently stands, or if you're noticing any of the warning signs above, that's exactly what a checkup is for. Liesse Animal Clinic in Dorval can assess your dog's teeth and gums, catch problems early, and help you build a home care routine that actually fits your dog.
