I have a broody mama who has been sitting on some fertilized eggs for a week. Neither of us have done this before but she seems to know what she's doing, and I'm optimistic that she'll get some to hatch. I've set up a little section inside the coop with a dog crate and a little plastic bin with one of the sides cut out for them to sleep in. I'll be adding feeders and waterers soon. But I'm trying to figure out - do I need to have the dog crate closed, so the other chickens can't get in? Or can I just leave the door off, in which case mama can get to her usual nipple waterer, and I only need to install a chick-height nipple waterer? TIA!