OldieOur dogs are very good at carrying on. The bowl gets emptied, the tail still goes, and nothing about the day announces that something in the mouth is off. We find out later, usually at a vet visit, when someone lifts a lip and goes quiet for a second.
This is a short reflection on why teeth are easy to forget in an older dog, and on a few things worth noting down for your vet. It isn't about what is going on in your dog's mouth. Only your vet can look.
It's more common than we tend to think
The American Animal Hospital Association's 2019 dental care guidelines say that by three years of age, most dogs and cats have some level of periodontal disease1. That's the association's wording, and it's about dogs and cats as a group, not about any one dog.
It's a surprising line to read the first time. Most of us picture dental trouble as something that shows up late, in a very old dog with bad breath. The guidelines suggest the story often starts years earlier, and quietly.
Why the numbers don't agree
A review in the Journal of Small Animal Practice went looking for how often periodontal disease turns up in dogs. It found that primary-care veterinary practices, where diagnosis is predominantly based on visual oral assessment of conscious dogs, report an average prevalence of 9.3 to 18.2%2.
That looks very different from "most dogs." The way the review frames it, the gap is partly about how a mouth gets examined. A quick look at a dog who is awake sees less than a careful look at a dog under a full dental exam. We read it as a reminder that a clean bill from a glance and a clean bill from a thorough exam aren't the same thing. We can't say more than the abstract does, and we won't try.
The review also says the disease varies between sizes of dogs, breeds and individuals2. So there's no single timetable to hold up against your own dog.
What we can notice at home
Nothing here is a way to tell whether your dog has a dental problem. These are ordinary habits for describing what you see, and your vet decides what any of it means.
- Write down changes in how your dog eats: dropping food, chewing on one side, leaving the hard kibble, taking longer than usual.
- Note anything you happen to see when you smile at your dog from close up, such as red gums or a smell that is new.
- Mention it if your dog pulls away when you touch the face or muzzle. Put the date next to it.
- Ask at the next visit how the mouth looks, and how the vet would like to follow it.
- Keep dental visits and any notes in the same place as everything else, so the whole household can see them.
Oldie is a care tracker for senior dogs: medications, care tasks, vaccines and weight, shared with everyone in the household. Every care task has an optional notes field, which is a handy spot for the small things you notice. More about Oldie.
We think there's something worth sitting with here. A dog who never complains is easy to take at their word. The mouth is one of those places where the kindest thing may be to look, and to keep asking, before the dog has to show us.
This post is general information only, not a diagnosis. Your vet knows your dog.
Questions, or a topic you'd like us to dig into next? Reach out any time: help@myoldie.com. We read everything.
Sources
- 2019 AAHA Dental Care Guidelines for Dogs and Cats. American Animal Hospital Association, 2019. Accessed 2026-10-30.
- A review of the frequency and impact of periodontal disease in dogs (Wallis and Holcombe). Journal of Small Animal Practice 61(9):529-540, 2020. Accessed 2026-10-30.
This is general information, not a diagnosis. Your vet knows your dog.