I don't know if this will help or not. Years ago I wanted to see baby chicks hatch. I had a cochin broody and I put her in a fruit box and put the box in my living room. The fruit box was an orchard lug and it is about 2 feet by 18 inches or so and the sides are about eight inches high. She sat there in the box on her clutch of eggs while everything went on around her. If a bug came by she would jump out of her box and grab it. I don't remember the smelly broody poo. It is possible she went outside for a short time each day. When the chicks hatched she jumped out of the box and the babies followed her across the room and out the door. At night she would come back with her brood in tow and peck at the glass in the door (I had a french door) and I would let her in and she and the brood would settle down in the box for the night. In the morning I would let her and the babies outside. This went on for several weeks.
