Coccidiosis is hard to control by sanitation practices alone.
It is best prevented by feeding a coccidiostat, which is a drug added to feed at low levels and fed continuously to prevent coccidiosis. Feed broilers a ration containing a coccidiostat until the last week before slaughtering. Feed an unmedicated feed during this last week. Mature chickens develop a resistance to coccidiosis if allowed to contract a mild infection of the disease. Birds raised for placement in the laying flocks are fed a coccidiostat feed until about 16 weeks of age.