Hi, i just bought a 8 foot long, four foot wide rabbit run, and is three feet high. It has no top but it is super sturdy and was only 20 dollars. He's in it now and I want to put his hutch in so he can go from the run to the hutch, but I am afraid he will escape because he looks like he wants to leave, and that he may somehow get out :? What could I use to cover it and can they jump that high without the hutch? Btw he is a dwarf/lionhead