I have 4 pullets that are about 5 weeks old and I think they're about ready to move into the coop. I read that you need to keep them locked in the coop for a couple days in order to imprint their new home on them and that they will then return there without prodding at dusk. I'll need them to go back into the coop at night so that I can close the coop door and protect them from raccoons, etc. I've tried to build the run to be completely predator proof, but raccoons just have too much time on their grubby little paws for me to feel completely safe. Any other things I need to consider before moving them into the coop? Thanks.