Hello all, My approx 6 -7 week old chicks have been in their new chicken coop for a week now. They are absolutely loving it. They love to go outside all day, and run around and seem so happy. I live in New England so nights have been in low 40's this past week. I have a heat lamp in their for them. I have three questions, I put them in the coop around 6:00 pm because we were going to dinner and I knew we would not be home till after dark. I did not put on their heat lamp, which also supplys light. When i checked on them they were all in one of the nesting boxes. I think they are afraid of the dark. I did have a solar light in there, but does not give off as much light. Should I continue with having a brighter light, when not using heat lamp? Next question, they come down onto the plank to go outside of coop fine, but they don't go up it to go to in at end of day. How do I get them to go in their coop at night? ALso I have a pretty thick layer of pine shavings on bottom of cage. It does not smell and their messes are all dried. Should I be changing the shavings once a week or more often?