I am new to BackYard Chickens. I am not sure if this is an issue or not so I am seeking advise. I am a new chicken owner. My girls are 13 weeks. We have a coop which is in a fully enclosed run. The run has perches of varying heights which they enjoy perching on. My concern is that at night, they do not go into the coop to perch and sleep. All 9 of them perch on the highest perch in the run and sleep there. Should I be concerned about this? If it is raining or storming will they go into the coop? Will they go into the coop during the winter months? Will they attract predators by staying out all night? Advise from seasoned chicken owners will be much appreciated.