Most dogs will average 10-13 years and. 's tend to live longer than most dogs. You can go to several sources to find breed life spans but the one I found most reliable is 13-15. Most. 's in my house and in my dogs lineage have long life spans of 14-16 years my bigger dogs tend to have spans of 10-12.So if they live a healthy life and are smaller the chances your dog will live longer increase.ost dogs on average only live between 10-15 years. Dogs that get up older have been well cared for and well maintained thru their life. Our breed has a rough time making it to 5 years old just due to the average no good people that own them.