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1 Tip, 1 Idea, 1 Quote.

On Your Dog's Age

Dog Trainer Auckland

June 2, 2026

1 Tip - on life with your dog

How old is my dog? The breeder will know their age, or if you are there when they are born, so will you, but a dog from a rescue? Their age will be a guide only. A dog's teeth provide the best estimate.

1 Idea - on the leading edge

Vets estimate a dog's age by examining their teeth. In puppies, it's surprisingly accurate. Called deciduous teeth, they are fully in by 6-8 weeks, then replaced with adult teeth by 5 -7 months. Each tooth arrives on a consistent schedule, with the canines usually appearing by 5 months.

Once all 42 adult teeth are in, vets use the wear patterns on the teeth to estimate age, with diet, chewing habits, and genetics all playing a part. But as you can imagine, it's an educated estimate, not an exact science.

1 Quote - on dogs

'Long in the tooth', a term originally used to estimate age by examining teeth in horses. The same principle applies to dogs (and women, when originally coined in 1852).

Close up shot of dog's mouth showing lower incisors

How old is your dog?

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