How Often Should I Brush My Dog’s Teeth? A Burlington Vet’s Answer

The phone rings a few minutes after we unlock the door on Brant Street. An owner is standing in their kitchen, dog at their feet, describing breath that could clear the room.

They sound a little embarrassed. They shouldn’t be.

It’s one of the most common calls we get all year. And somewhere in the conversation, the real question always surfaces: how often are they actually supposed to be brushing?

Daily is the goal. According to the American Veterinary Medical Association, daily brushing is best, and brushing several times a week can still be effective when daily isn’t possible. The Merck Veterinary Manual agrees that daily, or at least every-other-day, brushing is the most effective way to protect a dog’s gums.

That’s the short answer, and it’s more doable than most people expect. The longer answer is where the useful details live, so here are the questions Burlington owners ask us most.

What happens if I never brush my dog’s teeth?

Skipped brushing lets plaque win. The AVMA notes periodontal disease is the most common dental condition in dogs, and that by age 3 most pets already show early evidence of it. The Merck Veterinary Manual reports that up to 80% of dogs have some level of periodontal disease by age 2.

Plaque is the soft, sticky film of bacteria that forms on teeth after every meal. On its own, that film is easy to wipe away.

Left in place, it hardens and becomes the anchor for gum disease, which is the process a daily brush interrupts.

We see the far end of that timeline in our exam room most weeks. Red gum lines, heavy tartar, loose or painful teeth, and the bad breath that first sends owners looking for answers.

None of that appears overnight, which is the encouraging part. A steady home routine, paired with the oral checks that are part of a regular wellness visit, is what keeps most dogs off that path.

How long does it take for plaque to turn into tartar?

Faster than most owners think. The Merck Veterinary Manual reports that plaque left on the tooth for more than 2 days mineralizes into calculus, or tartar, that brushing can no longer remove. Cornell’s Riney Canine Health Center adds that fresh plaque starts building again within about 12 hours of a cleaning.

Tartar, also called calculus, is simply plaque that has hardened onto the tooth.

That short window explains the whole “why daily” question. The Merck Veterinary Manual notes that even after a thorough brushing removes plaque, a new layer has begun forming by the next day.

So brushing isn’t a one-time fix you finish and forget. It’s more like making the bed, a small reset you repeat because the mess returns on its own.

Cornell’s Riney Canine Health Center reports that brushing at least once daily, for roughly 60 seconds, is the best way to reduce the bacteria in a dog’s mouth. Sixty seconds is a realistic ask, even on a busy Halton weeknight.

At what age should I start, and is it ever too late?

Start once the adult teeth are in. Cornell’s Riney Canine Health Center advises beginning after all the adult teeth have emerged, then building up gradually with rewards. For an older dog who has never had a brush near their mouth, it’s rarely too late to begin a gentle routine.

Puppies lose those needle-sharp baby teeth and finish getting their adult set within the first several months. Waiting until that’s done keeps the experience comfortable while the mouth is still settling.

Older dogs are a different starting point, not a lost cause. Cornell describes brushing as the most effective method of home care for preventing dental disease, and that benefit doesn’t have an age cutoff.

The one thing we’d add for an older dog: have us take a look first. If there’s already tartar or a sore spot, a quick exam tells you whether the mouth is comfortable enough to start brushing today or needs attention at our dental service first.

Can I use human toothpaste on my dog?

No. According to the American Animal Hospital Association, you should use a pet-specific toothbrush with soft bristles and never use human toothpaste, which is often toxic to pets. Pet toothpastes are made to be swallowed and come in flavours dogs actually like.

The problem with human toothpaste is that dogs can’t rinse and spit. They swallow whatever goes in.

AAHA’s guidance is straightforward: reach for a product made for pets. Poultry and other dog-friendly flavours also turn brushing from a struggle into something your dog looks forward to.

AAHA also notes that to be of benefit, brushing needs to be done daily. A flavour your dog enjoys is one of the simplest ways to make a daily habit stick.

Here’s how the common home-care options line up.

How do I brush a dog’s teeth that won’t let me?

Go slow and make it a game. Cornell’s Riney Canine Health Center suggests a gradual ramp: run a finger along the outside of the lips and reward, then along the gums, then add paste, and only then introduce the brush. For dogs who still refuse, Merck notes a gauze wipe every 2 to 3 days can remove plaque.

Most brushing battles come from moving too fast. The mouth is a sensitive place, and a brush appearing out of nowhere feels like an ambush.

Cornell’s step-by-step approach spreads the introduction over days or weeks, with a treat at every stage. By the time the brush shows up, your dog already links the whole routine with good things.

Some dogs simply won’t tolerate bristles, and that’s alright. The Merck Veterinary Manual offers a practical fallback for those dogs: wiping the teeth with gauze at least every 2 to 3 days still removes plaque before it can harden.

The best routine is the one you’ll actually keep. Aim for the daily brush, and lean on the gauze method whenever a brush just isn’t going to happen.

Do dental chews and water additives work instead of brushing?

They help, but they don’t replace the brush. The AVMA and Cornell both describe brushing as the single most effective home step for a dog’s teeth. For products that do add value, the Veterinary Oral Health Council recommends looking for its Seal of Acceptance, given to items proven in trials to slow plaque or tartar.

Not every chew on the shelf earns that seal. The VOHC exists to recognize products that meet set standards for slowing plaque and calculus in dogs and cats, so its list is a useful filter.

Think of these as teammates, not substitutes. A VOHC-accepted chew or a dental diet works alongside brushing, and some of those diets fit naturally into a broader nutrition plan.

What they can’t do is reach everything a brush reaches, on the schedule a brush keeps. Cornell is clear that brushing remains the most effective method of home care for preventing dental disease, so the chews and additives are the supporting cast.

Does my dog still need a professional cleaning if I brush at home?

Usually, yes. The AVMA explains that most dental disease happens below the gumline, where you can’t see it, so a full cleaning and evaluation are done under anesthesia. Home brushing controls what’s above the gumline; the deeper work happens at the clinic.

Brushing and a professional cleaning do two different jobs. Your daily brush handles the visible surfaces and slows plaque before it hardens.

What it can’t reach is the space under the gum, and the AVMA notes that’s exactly where most dental disease hides. That’s the part we clean and assess during an anesthetized dental visit.

In Ontario, that anesthesia isn’t optional shorthand. The College of Veterinarians of Ontario requires that dental procedures use species- and procedure-appropriate sedation or general anesthesia together with appropriate pain control, which is why reputable Burlington clinics don’t offer “anesthesia-free” dentistry.

So the two work as a pair. Faithful home brushing often stretches the time between cleanings, and the cleaning takes care of what no toothbrush can.

Frequently asked questions

What are the signs of dental disease I should watch for?

The AVMA lists bad breath, broken or loose teeth, discoloured teeth or tartar buildup, abnormal chewing or dropping food, drooling, reduced appetite, pain or bleeding around the mouth, and swelling near the mouth. If you notice any of these in your dog, it’s a good reason to call our team on Brant Street.

How long does each brushing actually need to be?

Not long at all. Cornell’s Riney Canine Health Center reports that brushing at least once daily for roughly 60 seconds is the best and most effective way to reduce the bacteria in your dog’s mouth. One focused minute, most days, does far more than an occasional deep session.

Is brushing every other day good enough?

It helps a lot, though daily is still best. The Merck Veterinary Manual reports that daily, or at least every-other-day, brushing is the most effective way to improve and maintain a dog’s periodontal health. If daily feels out of reach, an every-other-day rhythm is a strong, realistic target.

My dog is older and has never been brushed. Is it too late?

It’s rarely too late to help. Cornell’s Riney Canine Health Center describes brushing as the most effective home care for preventing dental disease, and that holds at most ages. With an older dog, we’d suggest a quick oral exam first, so you start on a mouth that’s comfortable.

Do dental water additives count as brushing?

No, they’re an extra, not a replacement. The Veterinary Oral Health Council recommends choosing products that carry its Seal of Acceptance for proven plaque or tartar control. Even then, Cornell notes brushing stays the most effective home step, so additives work best layered on top of a brushing routine.

This article is educational and isn’t veterinary advice or a substitute for an exam. If you’re worried about your pet right now, call us at (905) 336-4002 or your nearest emergency veterinary hospital.

If you’re not sure where your dog’s mouth stands, the easiest next step is a quick oral exam with our team on Brant Street. We’ll show you what we see and help you build a brushing routine that fits your actual week.

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Sources

Veterinary associations and hospitals

1. American Veterinary Medical Association. Pet dental care. https://www.avma.org/resources-tools/pet-owners/petcare/pet-dental-care
2. American Animal Hospital Association. Your pet’s dental care. https://www.aaha.org/resources/your-pets-dental-care/

Veterinary references

1. Merck Veterinary Manual. Dental Disorders of Dogs. https://www.merckvetmanual.com/dog-owners/digestive-disorders-of-dogs/dental-disorders-of-dogs
2. Merck Veterinary Manual. Periodontal Disease in Small Animals. https://www.merckvetmanual.com/digestive-system/dentistry-in-small-animals/periodontal-disease-in-small-animals
3. Cornell University College of Veterinary Medicine, Riney Canine Health Center. Brushing Your Dog’s Teeth. https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information/brushing-your-dogs-teeth
4. Cornell University College of Veterinary Medicine, Riney Canine Health Center. Dental Disease and Home Dental Care. https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information/dental-disease-and-home-dental-care
5. Cornell University College of Veterinary Medicine, Riney Canine Health Center. How to Brush Your Dog’s Teeth. https://riney.vet.cornell.edu/member-benefits-health-tips/how-to-brush-your-dogs-teeth-feb-2025

Dental product standards and Ontario regulation

1. Veterinary Oral Health Council. About and Seal of Acceptance. https://vohc.org/about/
2. College of Veterinarians of Ontario. Professional Practice Standard, Veterinary Dentistry. https://www.cvo.org/standards/veterinary-dentistry