Title: 3 Ways to Determine Your Dog's Age - wikiHow
Headings: How to Determine Your Dog's Age
How to Determine Your Dog's Age
Method 1
of 3:
Determining Your Dog's Actual Age
Method 2
of 3:
Determining Your Dog's Age in Human Years
Method 3
of 3:
Seeking Help from a Vet
Expert Q&A
References
About This Article
Lauren Baker, DVM, PhD
Did this article help you?

Content: At four months, adult canines and incisors will start to come in. By seven months, a puppy will have a full set of adult teeth and will have developed molars in the back of the mouth. When a puppy reaches a year old, you should notice ridges or bumps on both the lower and upper top front teeth. Keep in mind that teeth tend to erupt later in toy dog breeds. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/97\/Determine-Your-Dog%27s-Age-Step-2-Version-2.jpg\/v4-460px-Determine-Your-Dog%27s-Age-Step-2-Version-2.jpg","bigUrl":"\/images\/thumb\/9\/97\/Determine-Your-Dog%27s-Age-Step-2-Version-2.jpg\/aid8850335-v4-728px-Determine-Your-Dog%27s-Age-Step-2-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"}
2
Note changes in teeth for an older dog. As a dog ages, their teeth change. Changes in teeth can help you assess a dog's approximate age. Ridges on the incisors change as a dog ages. By the time the dog is three years old, the ridges will have worn off the bottom incisors.