My 1 week old chicks have officially grown out of their rubbermaid tote. They were starting to go crazy running and flapping and it just didn't seem roomy enough for them. As of last night my 13 chicks have been in a playpen which seems to be working out great. They really seem to want to fly and like to run around flapping their little wings. 2 questions for you.... how long do you think I have before they try to fly out of it?? and do you think that they can stay in this until ready to go out in their coop? It's a regular full size playpen.