I have 3 8 week old Orpingtons chicks. These are my first chickens so I am new to all this! I have to put them in the coop at night and shut the door so they will stay in. I also have food and water in there for them but when I let them out in the morning I notice that they haven't eaten all night and are sleeping in the same spot I put them in! Is this normal and how do I get them to roost and go in on their own at night? There are also no windows in the coop. should there be? Thanks in advance!