Jumping, nipping, barking – Don’t yell. Don’t punish. A tired dog really is a happy dog. You can have a blast with your dog while s/he does all the running around. Agility is fast work for a dog while its person walks short distances. You and your pupster can do it in your yard. Group classes are good fun and the equipment is cheap. This tunnel, from bettersportingdogs.com, cost $72. Mick runs back and forth for fun. He also earns treats and toys. Best of all, he’s a calmer, quieter young hellion.