I have Gulliver set up in a puppy exercise pen in my dining room. It's pretty tall, but he has still managed recently to jump over the side. Besides the fact that I don't want him to get hurt, what can I do to stop this? I don't want to put him in a crate, the pen was working so nicely! Does anybody have any ideas for a top I can put on it? Mostly he does it when I'm around and he sees me, which is nice in one way. Also, if we don't let him out for a day (ie: I was at a conference last weekend, and my hubby is not as diligent as I am about letting him exercise. So after 2 days, Gulliver just leapt out himself. After that, he knows he can do it.) I keep telling my husband, a tired bunny is a good bunny, he needs to run around. Thanks for any advice!