Mandatory enhanced biosecurity measures which also include compulsory housing are designed to reduce the risk of free-range laying poultry becoming infected with Avian Influenza from wild birds.
Mae mesurau bioddiogelwch gwell gorfodol sydd hefyd yn cynnwys lletya gorfodol wedi'u cynllunio i leihau'r risg o ddofednod maes gael eu heintio â Ffliw Adar o adar gwyllt.