Crockpot has gone broody!
Since we have no rooster and it would be pointless to allow her to sit a clutch of eggs, we've set up our dog crate in the backyard on skids to raise it up off the ground (to let the air circulate; evidently if you let them lie down flat it keeps their body temp up and they won't break off the broody behavior), with a food dish and a waterer. She's NOT happy.
Velvet had to wear gloves to get her out of the coop and into the crate. Drumstick is pacing around the outside of the crate, very interested in Crockpot's food (same thing as in the feed box of the coop, but chickens are stupid). It's like visiting day at the penitentiary. We're going to leave her in the crate until Sunday and see if that takes care of the situation. If not, we'll have to move on to Plan B (except that I don't really have a Plan B at this point).