I have some 2 month old chicks that are ready to integrate. The problem is, these chicks (pullets?) stay huddled in the corner of their space. I've tried for two days to get them to come out by leaving their door open but they just stay huddled and the big girls eat their food and drink their water until it's gone. How can I get these girls to come out? I tried setting one out of their cage and she immediately ran back to the huddle. Should I force them out? I've never actually seen them other than huddled.