I have 4 peafowl 3 and 4 mo. old and it gets cold here in PA any sugguestions on what to feed and should I have any heat lamps put up for some warmth. Right now they can go freely inside or out they have an outside pen 8x16 and inside 8x5 they have a roost inside and out. No matter the weather they roost outside and inside during the day. Now im worried about the winter them being outside. Is this normal