Answer:
There wasn't much to "summarize" to begin with, but here ya go...
Dogs need exercise to burn calories, stimulate their minds, and keep healthy. Supervised fun and games will satisfy many of your pet's instinctual urges to dig, herd, chew, retrieve and chase.
If your dog is a 6- to 18-month adolescent, or if she is an active breed or mixed-breed from the sporting, herding, hound or terrier groups, her requirements will be relatively high.