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Extensive (free range) system
In extensive system, birds are left to roam over a wide open area which may have permanent fence of wire netting and simple house.
Birds are set free throughout the day to fend for themselves and take shelter at night in a poultry house. Laying nests are placed in the house, while feed and water troughs are placed outside the house. The open area can be partitioned into runs to allow proper rotation to reduce disease and parasites in birds.