One of my girls has just started laying. My husband made a nesting box out of a 5 gallon bucket but she wants nothing to do with it. Instead she escapes and has found a styrofoam cooler that was half covered with a towel that was up off the ground. She won't lay anywhere else and even refuses to lay in that box if it is flat on the floor. Should I just keep allowing her to use this or is there a way I can train her?