My hen and her new chicks don't like to go into the coop at night. The last 2 nights I have picked chicks and mum up from the floor of the run and had to put them into there coop, much to mum's annoyance, and a great deal of pecking. The coop has a gentle sloop to about 8 inch off the ground. They come down by themselves alright the next day. Am I best off making a rat proof sheltered sleeping area at ground level or shall I continue to put them to bed? I worry about them being exposed of the floor.