I have had two dogs for the past twelve years. They have been best buds. Cinnamon and Chipper were both Puggles, half Pug and half Beagle, the weren't from the same litter but they sure thought so. They were both the same age. So really they were like sisters.
I know that going for a walk with your dog is by far a healthy thing for you to do for yourself; but it is also great for your dog. You both get to go outside in the environment. You both get some much needed exercise.