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How long is the average life span of a dog? How many years is the average life span of a dog?

1. Small dogs generally have a life span of 8-16 years. Under normal circumstances, the life span of a dog is between 10 and 15 years, with the average life span being about 12.6 years and the longest being more than 20 years. The Maltese is 18 years old, the Poodle is 15 years old, and the Miniature Dachshund is 14.4 years old.

2. Whippet 14.3 years old, Pomeranian 14 years old, Chow Chow 13.5 years old, Miniature Schnauzer 13.5 years old, Shih Tzu 13.4 years old, Shetland 13.3 years old, Border Collie 13.0 years old, Chihuahua (Chihuahua) is 13.0 years old, Fox Terrier is 13.0 years old, Basset Hound is 12.8 years old, West Highland White Terrier is 12.8 years old, Yorkshire Terrier is 12.7 years old, and American Cocker Spaniel is 12.5 years old.

3. Seven years after birth for small or medium-sized dogs, or five years after birth for large dogs, they have slowly entered old age. Usually, dogs are in their prime of life from the age of two to five. They will gradually age after the age of seven, and basically become infertile around the age of ten.

4. The life span of large dogs is shorter, and the average age is generally around 99 to 12 years old; the life span of small dogs is slightly longer than that of large dogs, with the average age being 12 years old. Around the age of fifteen, of course there are some dogs whose life span is as long as twenty years (such as Shih Tzu, Pekingese, etc.). Breeding dogs like this are relatively long-lived dogs, and the longest lifespan record is thirty. Four years old.