Coach has officially been broken of her broodiness. We had her in the cage for 2 1/2 days, and when she went back in the run/coop on Monday, she spent entire day outside of the coop (as opposed to nesting inside).
We've been letting Spicy out of the pen to poke around the backyard here and there, and we gave Coach a chance to explore as well. They're both very easy to guide back into the pen.