The average lifespan is about 10-13 years. Here's a fact you probably didn't know, the longest living dog lived to be 29 years old. 

Dogs have been around for more than 30,000 years.

If you couldn't tell by the picture it was a Basenji. The Basenji was the first dog breed. It is known for its cat attitude. So if you want something that is not a cat, but acts like it. I recommend the Basenji.