The average lifespan of a dog is said to be between 11 and 12 years. Studies show that only 20% of dogs live over their 14th birthday, with fewer than 10% making it to their 15th birthday.
However, not all dogs live to their full lifetime potential. There are factors to consider, such as the breed and size of the dog in question. The health of the dog also must be considered.
Unfortunately, even if you could nail down the average lifespan of dogs to a number, it’s not helpful for every dog breed. This is because breeds, sizes, the structures of the different breeds, and health issues must be considered as well.