Does having a dog prolong your life?

i
heard somewhere that having a dog prolongs your life. if this is true how would
it be possible, and can you provide any sources that i could read to learn more
about this?
Owning a pet can be a great way to stay healthy! Pets are great companions, and
owning a dog creates demands for physical activity. Check out the article below
- you might find it interesting.
What I've heard is that because of the companionship a dog provides and dogs
make most people happy having a dog prolongs your life--so, actually being happy
prolongs your life? sorry I don't have any sources.