When dogs are happy, they run, jump, follow the leader, wrestle, body slam, do water ballet in the air, and even play in the pool. They are overflowing with enthusiasm and need a healthy way to let it out. A major perk of playing dog football and soccer is the mental stimulation it gives. Not only does it get them moving, but it also entertains. Playing these games can keep them from getting bored, calm their nerves, and curb bad habits. Plus, getting some exercise is good for their mental and physical health.