I've been brooding 6 RIR chicks for about a month now, all the baby fluff is gone and they look like mini chickens. They still make chick peeps but once in awhile I hear a chicken sound come from at least one of them. I live on eastern Long Island where I'm pretty sure the danger of frost is over but it still gets cool at night...maybe down to the 50's. I was originally going to put them in with my ~22 week gingernut rangers in my eglu cube, but have now decided that despite the claim that the cube can hold ten...it's just to small for all of them and will buy another one for the chicks. So when can I safely take them out? I still have the heat lamp on although on nice days I open all the window in the room to get them accustom to the cooler temps and they seem to be fine. The feed place said to leave them inside until June but they are growing so fast, despite getting a larger cage I doubt they will all fit comfortably much longer and I haven't seen a larger cage available. Any suggestions? Should I turn off the heat lamp and leave the windows closed for awhile?