Checking Your Dog's Age By His Teeth... (2024)

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How Can I Tell the Age of My Adopted Dog?

The first question most people ask about your dog is what breed he is. The second question is how old is he? But when adopting a dog, we don’t always know the dog’s history. Dog rescues and humane societies are usually taking a guess based on certain physical appearances. It can be difficult to know how to tell how old a stray dog is.

While you may never know your dog’s exact birth date, there are several physical attributes to look for that can give you a good estimate of how old your dog really is. If only our dogs could talk to us right?

All of these vary based on your dog’s breed, nutrition, and his medical history. Our first foster dog, Silla, was an owner surrender, so we did know her age… she was 10 years old. The vet was actually shocked to learn how old Silla was because her teeth were still pearly white, very rare for a dog her age.

1. Check Your Dogs Teeth.

So you ask, how old is my puppy? Young puppies are much easier to determine age by their teeth. Take a look at the chart below that shows how to estimate your dogs age by looking at his teeth:

Checking Your Dog's Age By His Teeth... (1)


By the time your dog is about 4 months old, his adult incisors, canines, and premolars should be coming in. When your dog is about 6 months old, all of his baby teeth should be gone. This is usually a very welcoming stage in a puppy’s growth, it means you are past those needle sharp teeth that like to mouth everything!

If your puppy has any baby teeth left, he is most likely younger than 6 months old.

Checking Your Dog's Age By His Teeth... (2)

If you have adopted an adult dog, it is going to be more difficult to determine age by his teeth. But you can guess that the more plaque builds up, the older the dog is. If his teeth are pretty clean, my guess would be he is younger than 3 years old. The above photo is of a 3 year old yellow lab.

2. Is your dog turning grey?

This one is pretty simple, just like humans; dogs can turn white or grey as they age. Usually, around 5 years old you will notice some graying around your dog’s face and muzzle. But greying is not always an accurate sign, as some dogs have been known to start graying as young as 2 years old.

3. Observe your dog’s eyes.

Gaze into those big beautiful puppy eyes. This is something I never knew before, but as your dog ages, his eyes develop what they call, lenticular or nuclear sclerosis. It looks like a haze or grey film over the eye. And as your dog gets older, the gel inside the lens becomes thicker, hardened and changes color. This graying in they eyes usually start around 5 years old and becomes more prominent as the years pass. There is a great article on PetMD, Is it a Cataract or Lenticular Sclerosis?

If you concerned at all about your dog’s eyes, I recommend taking him to the vet to have it checked out.

So with these three clues, teeth, coat and eyes, you can get a good estimate of how old your dog really is. But you also need to consider the breed of your dog. Larger dog’s age quicker than small dogs. Does age really matter? It is just a number, right?

Dog Years Versus Human Years

So now you have an idea how old your dog is in dog years, you may be wondering how old is my dog in human years? How long is a dog year anyway? I found it interesting that the common theory of 1 human year equals 7 dog years is actually not true! Really, I believed this my entire life until today!

It turns out that a one-year-old dog is one in dog years but 15 in human years. Wow, that’s some quick maturing. This goes for all sizes of dogs. But after about 5 years old, the conversion changes based on the size of your dog. Below is a greatdog years converterchart to show how old your dog is human years:

Dog Years ConverterChart

Checking Your Dog's Age By His Teeth... (4)

Now that we havedog years explained clearly,enjoy every day, every month and every year you have with your dog. Time passes so quickly! Keeping your dog happy and healthy is the most important part of your life together. Feed him a high-quality food, bring him to the vet for yearly checkups, and give him plenty of exercise and love.

RECOMMENDED FOR YOU:

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About the Author

Debi@RescueDogs101

Debi McKee is a mom of three kids, three dogs and the creator of Rescue Dogs 101... where she guides you in your journey of adopting and raising a rescue dog every step of the way. She also volunteers for a local dog rescue and Humane Society.

Leave a reply

  1. I havea rottweiler german shepherd mix puppy shes about 16weeks. When she starts nipping i take my thumb and place it just a little behind her nose and my middle and pointer fingers under her lower jaw and put a little pressure and tell her no sternly.. it dont hurt her. But SHE STOPS.. the issue im having is she will go to the bathroom when i take her outside but not even five mins after i take her back in the house she goes again on the floor. No matter how long i stay outside with her. Help.. lol

    Reply

  2. I was given a rescue Border collie dog in a pitiful state, and supposedly 8 years old. But I am sure she’s a lot younger: no grey round her muzzle, beautiful clear eyes and virtually no plaque on her teeth. She is high-energy, and very much appears to be only a year or so old, reminiscent of my previous lovely lass we acquired at five months. She has a lovely temperament learns very quickly, and has a sweet face. As I am disabled, I would like to train her to become an assistance dog, but am not sure if I can do it or need professional help with her.
    Any ideas most welcome!
    Hannah and Hollie the collie – woof!

    Reply

    1. Absolutely find a professional trainer to help you. Even if it’s to get you started. in the right direction. Congrats and good luck!

      Reply

  3. Okay so what about the dogs that have been very well took care of and given treats food and all needed to prevent the build up om the teeth is it possible that they are mistaken a 1-2 year old dog with a 3-4 ????? I just dont understand how a shelter can say oh this dog is 1 or 5 or whatever when there’s no absolute way to tell

    Reply

    1. You are right, there is no absolute certainly unless you know the original owner of the dog. We had a 10 year old foster dog that the vet was shocked that she was that old because her teeth were perfect. So yes, it’s an estimate.

      Reply

  4. I have resued many dogs and cats in my 77 years. I have found they make great pets. I have only had 1 dog I bought from a breeder. A mini grayhound. I had him from 5 weeks old to 23 years. He was my fur baby for sure. He was born with only 3 feet. He also had secures, but I did not care. I treated and loved him like my real baby. We were never apart except when I had my heart attack and then only 3 days. I could not stay away from him. We were inseparable. He has been gone 2 years now and I still cry and miss him. I dohave another rescue and he is great, but not my Itabit.. ( that was his name)

    Reply

  5. Most of the observations are valid, but I disagree with the White/gray hairs around dog’s face and muzzle. B’cuz Black Labs who have been under a bit of stress can acquire early gray hairs.

    Reply

    1. That is literally what was said…

      Reply

Checking Your Dog's Age By His Teeth... (2024)

FAQs

How accurate is aging a dog by teeth? ›

After a dog's adult teeth have erupted, there isn't an accurate way of aging a dog based on their dentition, says Dr. Heather Loenser, veterinary advisor for the American Animal Hospital Association (AAHA).

Can you tell how old a dog is by its teeth? ›

Wear and gum disease are more common when your dog or cat is between the ages of five and 10. Elderly pets may eventually lose teeth due to tooth decay or gum disease, and their teeth may show considerable wear. Determining age by the condition of the teeth isn't an exact science.

How can you tell a dog's true age? ›

As a general guideline, though, the American Veterinary Medical Association breaks it down like this: 15 human years equals the first year of a medium-sized dog's life. Year two for a dog equals about nine years for a human. And after that, each human year would be approximately five years for a dog.

What is the hardest dog age? ›

The most challenging time of raising a puppy is the adolescent period. Dogs become “teenagers” and seem to forget everything they have ever been taught. This period is individual to each dog, but it may begin when he's about eight months old and continue until he's two years old.

How do you count puppy months? ›

My puppy was born January 22nd, 2020. so tomorrow, he will be 25 weeks old (25/4 = 6.25 months).
...
What I do is this:
  1. Up until 3 months (12 weeks) I count in weeks.
  2. From three months onwards to a year it's by month (real month not a period of weeks.)
  3. After a year I round to the nearest half year and stay at that.
14 Jul 2020

Do dogs get new teeth at 2 years? ›

Teething is a months-long process. It starts when puppies are around 2 weeks old and their first baby teeth start to come in and usually ends at around 8 months of age, when all the adult teeth are fully erupted.

At what age do dogs turn old? ›

Small dogs are considered senior citizens of the canine community when they reach 11-12 years of age. Their medium-sized friends become seniors at 10 years of age. Their larger-sized colleagues are seniors at 8 years of age. And, finally, their giant-breed counterparts are seniors at 7 years old.

What should a 4 year old dog's teeth look like? ›

From 3-5 years of age there will be yellowing on all teeth, tartar will begin to build up on the molars, and the front incisors will begin to show wear.

How old are dogs when they stop mouthing? ›

The most important thing to remember is that for the vast majority of puppies, mouthing or play biting is a phase that they will typically grow out of once they reach between three and five months of age.

What age are dogs smartest? ›

“Their stunning flashes of brilliance and creativity are reminders that they may not be Einsteins but are sure closer to humans than we thought.” According to several behavioral measures, Coren says dogs' mental abilities are close to a human child age 2 to 2.5 years.

Which dog age is longest? ›

Bluey, an Australian cattle dog, entered the Guinness Book of World Records by living to the ripe old age of 29 years and 5 months, setting the record for oldest dog ever. The record was set in 1939 and still stands, but many Australian Cattle Dogs have tried to beat it by living good long lives of their own.

Which breed of dog has longest age? ›

Australian Cattle Dog

An Australian Cattle Dog called Bluey holds the record for the longest-lived dog - reaching an incredible 29 years of age. The breed normally lives for around 15 years.

How old is 3 months for a puppy? ›

If you're adopting or purchasing a young puppy, there's a good chance the puppy is nearing 12 weeks of age (three months old). Between 12 to 16 weeks of age, your puppy may destructively chew on toys or household items and become fearful of its surroundings.

How old is 2 months for a puppy? ›

Averaged together for both brain and body development, a two-month-old puppy is probably about the same age as a one-year-old human. At one month, he is probably closer to a six-month-old human. At four months old, he is probably roughly the same age as a two or three-year-old human.

Is 4 months still a puppy? ›

4-month-old puppy

At 4 months, your puppy is growing rapidly. By this time they're likely at least half of their adult weight—and their personality is blossoming. They're more independent, more curious, and more inclined to get into everything that's get-into-able.

Why does my 1 year old dog still chew? ›

It's normal for puppies and dogs to chew on objects as they explore the world. Chewing accomplishes a number of things for a dog. For young dogs, it's a way to relieve pain that might be caused by incoming teeth. For older dogs, it's nature's way of keeping jaws strong and teeth clean.

Can my 1 year old dog still be teething? ›

Teething technically ends when all 42 of your dog's adult teeth have finished coming in, which is usually around 5-8 months of age. By the time your dog is one year old, all of their adult teeth should have come in.

Do puppy teeth turn black before they fall out? ›

Black spots on your dog's teeth indicate that the pulp or center part of the tooth has died. This is a normal part of your puppy losing their teeth. Over the next few weeks, this tooth will become lost and fall out. If you are noticing black areas on your puppy's adult tooth, it would be best to see your vet.

What does bad dog gums look like? ›

“Healthy gums should appear shrimp-colored pink,” says Dan Carmichael, DVM, DAVDC and board-certified veterinary dentist at the Animal Medical Center. “Unhealthy gums will appear red and inflamed.” Certain diseases can cause discoloration of the gums. For instance, red, inflamed gums can be a sign of gingivitis.

Do dogs gums turn black as they age? ›

Over time, the gums can darken, especially when they are not well irrigated. Gum disease can also result in other types of discoloration or symptoms such as bad breath or bleeding. Gingivitis: while gingivitis is a type of periodontal disease, usually in the early stages, we can mention it on its own also.

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