At this time of year?

I have two broody hens.  Why.  Why now?  Anyway, a broody hen is about the stubbornest thing there is, so all I can do is give them eggs, see what they can do.  Maybe they change their minds when it gets colder.The chickery is a duplex again, with the Oreo's mom (white) and one of the Heathers,   each with a box, sharing the "yard" and snack bar. I covered the chickery with canvas, I was thinking to reduce light and distraction, and especially reduce the chance of birds falling in, because all the birds like to perch on the edge of the chickery.  They switch boxes multiple times a day.  They come out to eat, or poop, and then the other hen comes out, and the first one back gets on the first eggs she sees.  This used to provoke very loud outrage, but now they've both learned to just go find the other box, and so far they are pretty responsible.  Snow White's a proven mama, she raised the Oreos (now gigantic and disrepectful).