So I have a GT German Shephard puppy. No really she is! Very smart, gets bored very easily. Challenging behaviorally-just like my kids! So I spend a lot of time and money on agility classes, finding new toys (that will withstand those teeth), researching games to play with her. What toy is her favorite? The hula hoop I brought home from school-$1 hula hoop, hours of play-priceless!