My 8 chicks were purchased as day old chicks on March 7th. They have been in their coop for about 1 week. They will come down the ladder in the morning when I open the door but they do not go up at night. My daughter and I have to chase them around and put them into the coop at night. They seem frazzled and done for the day. They sit huddled together and close to the ground but will not go up. The ladder looks like all of the ladders from the coop design pictures. Wondering if it is their age? Will they ever learn to go in?