Therefore, it's impossible to talk about their lifespan in the wild.
However, the average lifespan of a Newfoundland dog in a domestic setting is 8-10 years. Some individuals may live longer, up to 12 years or more, with proper care and good health.
What is the life span of a Newfoundland dog in wild?
Newfoundland dogs are a domesticated breed and do not exist in the wild. They were originally bred for working purposes, such as pulling fishing nets and rescuing people from the water.