I have one broody hen now who is on day three sitting on her eggs. Maybe I don't understand what breaking broody means, because if I don't want them to be broody I can remove the eggs. I can close my boxes to keep other hens out, but I haven't had to do that yet.
Their boxes are shaded and dry, and they seem to like them. I built them so that each hen can get their own private box, and so far it is working for three broods. After the eggs hatch they continue to live in the same box with their babies until the babies outgrow it and move to the adult house.
A huge disadvantage is that until the hen stays with the eggs all day and night, because of rats I have to bring the eggs into my house at night, and put them back outside in the morning. If I don't bring them in at night, I would find empty eggshells all the time in the morning.
Here are a couple other of my brood boxes. They were thrown together, but only four of the eggs hatched in the cardboard box because another hen sort of sabotaged that one. These eggs are dead and I am removing them today. The box will remain since the mother is living in it now, but it will be gone after she leaves since I discovered the vegatable crates work well stacked on each other at an angle. The other box is a veggie crate inside a rice bag for warmth and protection from moisture.
This is the hen that lives in the cardboard box.
My very first brood box was open and inside my house because I had not built any coops outside. It was comfortable for the hen but not ideal since the chickens were inside. This was from September and I think one of my first broods. Since then all the chickens have been moved outside.
Building the broods has been a process but it's coming along as more space is needed it takes time to build things around their biological needs.
This is inside my house where my ducks just hatched four eggs. She was broody for a month inside the house. The ducks sleep here on the ground now with the babies, I close the male off at night. On the shelf sleeps my blind chickens because I bring them in and out at night. Sorry I didn't have time to sweep the floor for the picture today. The duck made her nest super cozy with her down.