Poultry companies are advised to keep their free-range chickens away from areas where waterfowl are known to congregate. The Animal Sciences Group of Wageningen University advises poultry concerns to make a strong statement among their ranks, or to even make strict controls.
Chickens without shelter or a fence to protect them are exposed to several risks. The birds can intermingle with wild birds, increasing the chance of illness.
Source: ‘Buitenlopende kippen liever niet in buurt watervogels’