I feared this would happen, and it has. Marley won't stay our of our tree!! He climbs is, chews on it, plays with it, bats the ornaments everywhere! We have a squirt gun that we use to get him out of it and if we catch him in time keeps him from getting in it. But if we aren't around or it's night time you can forget it, he is in there playing away. Tiring him out doesn't work, he is just too interested. Short of keeping him in the bathroom, which I did the first night, I don't know what else to do. Is this a lost cause??