How do you tell the age of a Golden Retriever? To judge the age of a Golden Retriever, judging from the teeth is a more accurate method. Golden Retrievers grow deciduous teeth about 20 days after birth, begin to change teeth at 3-4 months, and complete the tooth replacement at about one year old. Teeth will show slight wear and tartar at the age of 3-4 years, obvious wear and tear at the age of 5-6 years, and the teeth will begin to fall out at the age of 7-8 years.

Golden retriever puppies begin to grow deciduous teeth around 20 days after they are born. The deciduous teeth will fall out and permanent teeth will grow at 5-7 months. Therefore, if a Golden Retriever puppy’s deciduous teeth have fallen out and the permanent teeth have not yet been exposed or not much is exposed, their age is generally only 5-6 months. If all the permanent teeth have grown in, the age is about 8-12 months. Before adulthood, the growth state of the teeth shows the increase in the dog's age, but once it reaches adulthood, the identification of the dog's age can be determined by the wear state of the teeth.

Under normal circumstances, for adult dogs over 3 years old, the joints between the upper and lower front teeth of the upper jaw and lower jaw will be worn. For adult dogs over 4 years old, the joints between the upper and lower front teeth often become flat due to wear. Teeth will appear in a rounded rectangular or oval shape.

For 7-8 year old dogs, it can be observed that their teeth have begun to fall out. The age of a dog can also be determined based on the length of its teeth. In addition, it can also be observed and identified from the state of the whole body. For example, the tightness of muscles, the luster of coat color, face, nipples and sexual organs can also be seen from the eyes. When golden retrievers enter old age, their eyes will become cloudy and even suffer from cataracts.