Finally got these breeding cages done for my buttons. I bought a metal shelf awhile back, we put a metal sign on the back and then we put small wire cloth of the front and put wooden "flap" doors on each pen. And Vola - 6 Breeding cages! I have 2 other shelfs that are awaiting to become breeding cages as well. I maynot need them until next Spring though. Let me know what you think!