Nellie was seriously broody. It took 4 days to break her by placing her in a bare ground tractor all day, every day. At the end of each day, I'd let her out of the tractor to rejoin the rest of the flock, and block off the nest boxes. She had no choice but to sleep on the roosts. I was pleased at how well this worked, and it was the easiest solution in my case b/c I had the tractor sitting empty.