I just got my first Hedgehog today. I think I picked an almost perfect one. He's already run a mile on his wheel, he's already using the litter box, and he's not too huffy or quilly. He will readily climb from his cage floor to my hands. The only problem I can see is he climbs the sides of his cage and then doesn't know what to do so he just falls. It's a good foot and a half from the top to the bottom and I'm afraid of him getting hurt. I've tried adding padding to the floor, but he still makes a great big thump when he falls. Any ideas to get him to stop climbing??