according to the independent, having a dog can make one "happier".

If you are looking for a healthier life, get a dog. Scientists have long believed that the companionship of a pet can be good for you, but new research suggests that dog owners are physically healthier than cat owners.
According to Deborah Wells from Queen's University, Belfast, dog owners tend to have lower blood pressure and cholesterol levels, possibly thanks to regular walks with their four-legged friends.
Writing in the British Journal of Health Psychology, Dr Wells said that dog owners appear to suffer from fewer minor ailments as well as fewer serious medical problems.

well thank god for the scientists that did that study. at least now i know in between all the chewing of my shoes and underwear, my dog will at least benefit my good health and help me outlive those without dogs. but then again, i'm going to outlive my dog. hmmm....