So I've been looking for a nice rat playpen for a while but always seem to run into the same problems. I need one that is going to be fairly large in circumference as well as tall, but with no bigger than 1/2 inch bar spacing. My girls squeeze right out of the 1 inch space with no problem. It has to have bars because my girl, Gypsy, can go through any sort of webbing in a matter of seconds. I was going to just get them a pack and play but she will chew out. Another reason I like the metal bar ones is that I can buy covers so they can't jump out. Do you have ones that may fit what I'm looking for??