HI! We too have one VERY HYPER bully baby. She is 4 years old, and has just begun to slow down (just a little). We found that the best way to wear her out is to play with a laser light ... We run the laser light on the floor - in the yard, up the stairs, down the stairs around the furniture....and she just chases it and chases it until she gets tired.. and then sleeps for hours.... it's great exercise for her too! Our other two like the laser light, but they are a little lazy and give up after a couple of laps....