Single-level barns. A simple closed building that is thermally insulated and with forced ventilation. At least a third of the floor area must be covered with bedding (e. g. chopped straw, wood shavings). The rest is arranged as a pit covered with slats to collect droppings over the 13–15 month egg laying period. Alternatively the droppings may be removed periodically with a scraper. Laying nests, feeders and water supply are placed over the slatted area to keep the litter dry.
