To limit mortality among baby chicks in the free-range system, take steps to protect the mother hen and the chicks from predators, thieves and rain. Put them in a simple, separate shelter that is roomy and airy and can be closed securely. Draughts and low temperatures during the first few days are particularly dangerous for the baby chicks. Although a run is handy, it is also risky, due to possible worm infections. It is important to move the run regularly, especially in wet weather. Fold units are very suitable mobile housing units for young chicks (figure 8 and figure 9)