When Should My Dog Get His Teeth Cleaned?

This is one of the most common questions we get at Prairie Animal Hospital, and the honest answer is “it depends on the dog.” I know that’s not the satisfying number you were hoping for, so let me walk you through how we actually decide, and you’ll be able to look at your own dog and have a pretty good idea of where he stands.

The short version

Most dogs need their first professional dental cleaning somewhere between two and four years of age. Small dogs land on the early end of that range, and some need it before their second birthday. Large dogs can often wait a little longer. After the first one, the interval varies quite a bit from dog to dog, which is why we check teeth at every wellness exam instead of putting everyone on the same calendar.

Now the long version, because this is a Nerdiness-is-a-core-value kind of practice.

What’s actually happening in your dog’s mouth

Within hours of a cleaning (or a meal, or a nap), bacteria start forming a sticky film on the teeth called plaque. If plaque sits there long enough, minerals in saliva harden it into tartar, which is the brown crust you can see along the gumline. Tartar is rough, so more plaque sticks to it, and the cycle picks up speed.

The part that matters isn’t the visible crust. It’s what’s happening under the gums. Bacteria work their way beneath the gumline, the gums get inflamed, and over time the bone and ligaments holding the tooth in place start to break down. That’s periodontal disease, and by the time it’s obvious from across the room, a lot of damage has already happened where nobody can see it.

Dogs are also very good at hiding mouth pain. They’ll keep eating with a cracked tooth or an abscessed root because the alternative is not eating, and most dogs have strong opinions about that.

Why small dogs go first

Small and toy breeds get periodontal disease earlier and faster than big dogs, and it comes down to geometry. A Yorkie has the same 42 teeth as a Labrador, but they’re packed into a mouth the size of a walnut. Crowded teeth trap more food and plaque, and the jawbone around each tooth is thinner, so it doesn’t take much bone loss before a tooth gets loose.

Short-nosed breeds like Pugs, Shih Tzus, and Bulldogs have the same crowding problem plus some teeth that come in sideways or rotated. Greyhounds and Dachshunds also tend toward early dental disease for reasons we don’t fully understand, though genetics is the leading suspect.

If you have a dog under 20 pounds, expect us to start talking about a dental cleaning around age one to two. That’s not a sales pitch; it’s just what their mouths do.

Puppies have dental needs too

Before we even get to adult tartar, there’s the baby-tooth phase. Puppies lose their deciduous teeth between about four and six months of age. Sometimes a baby tooth doesn’t fall out when the adult tooth comes in, and now you’ve got two teeth wedged into one spot. That’s a retained deciduous tooth, and it’s a very common finding in small breeds.

We check for this at every puppy visit, and if a baby tooth is still hanging around when the adult tooth is fully erupted, we recommend removing it, usually at the same time as the spay or neuter so your pup only goes under anesthesia once. Leaving it in traps debris between the two teeth and can push the adult tooth out of alignment.

How we grade what we see

At every wellness exam, we look at your dog’s teeth and assign a rough grade based on tartar, gum redness, and any loose or broken teeth. Here’s roughly how it maps to a recommendation:

• Clean teeth, pink gums: Keep doing what you’re doing. We’ll look again next year.
• Mild tartar, slightly pink gumline: This is the sweet spot for a cleaning. The gums are irritated but the bone underneath is still healthy, and a thorough cleaning resets everything.
• Moderate tartar, red or receding gums, bad breath you can smell from a few feet away: We’d like to clean these teeth soon, and we’ll probably find a few that need attention once we can see under the tartar and take X-rays.
• Heavy tartar, wobbly teeth, drooling or dropping food: This dog is in pain. It’s not an emergency in the ambulance sense, but we want to get him scheduled.

The reason we push for the “mild” stage rather than waiting is simple: a cleaning at that point is a cleaning. A cleaning three years later is a cleaning plus extractions, and nobody enjoys that conversation, including us.

Why we use anesthesia

You’ve probably seen ads for anesthesia-free dental cleanings. They look appealing, and I understand why. Here’s the problem: the tartar you can see on the outside of the teeth is the cosmetic part. The disease is under the gums and on the inside surfaces of the teeth, and there’s no way to clean those areas on an awake dog without hurting him. You also can’t take dental X-rays, and X-rays are where we find the abscessed roots and fractured teeth that look fine from the outside.

A proper cleaning at PAH includes bloodwork beforehand, a dedicated technician monitoring your dog the entire time, full-mouth X-rays, scaling above and below the gumline, polishing, and a tooth-by-tooth exam by me. Your dog goes home the same day and is usually back to normal by dinner.

What you can do at home

Brushing is the gold standard, and if you can get a toothbrush into your dog’s mouth a few times a week, you will stretch the time between cleanings significantly. Start slow, use a pet toothpaste (human toothpaste isn’t meant to be swallowed), and keep sessions short. Dental chews with the VOHC seal, water additives, and dental diets all help too, though none of them replaces brushing.

One thing that doesn’t help: tennis balls. The fuzzy coating acts like sandpaper on the teeth. Your dog will not thank you for this information.

So when should you call?

If your dog is over two, or over one for the small guys, and you haven’t had his teeth looked at recently, book a wellness exam and we’ll tell you exactly where he stands. If he’s already got the breath, the brown crust, or he’s started chewing on one side, don’t wait for the annual visit.

You can request an appointment through our website or give us a call. We’re happy to look, and we promise not to judge the breath.