I read somewhere here that you should train them to return the to coop (building) at night. I guess I thought that was kind of a given, that they would want to go in there. My chicks are still in the house right now but will be going out soon. Is this something that I have to train them to do? (If so, how?) or will it be instinctual. I plan on having them in the coop for a few days before releasing them outside (good idea?) Thanks! Hopefully all these EE's & Wyndottes are pullets!