I just want to add one more thing that maybe you may not know but as well as being all feathered, they should be totally off their heat lamp, night and day. If you have a colder part of the house, I would move the brooder to that location so that they begin to get used to the lack of heat. Also be sure your coop has good ventilation at top but completely draft free. I'm kind of new too but these are some of the things that I have learned from reading stuff in here and where others have directed readers by adding links.
Believe me, the more you learn about chickens and everything to do with them, the more you will realize that you STILL have a LOT to learn! But don't worry too much, the addiction to this website helps a Lot!