There are some studies on how to scare birds in airport, they can be used in those farms as well. See: https://newatlas.com/optical-illusion-raptors-airplanes/

There are some studies on how to scare birds in airport, they can be used in those farms as well. See: https://newatlas.com/optical-illusion-raptors-airplanes/56753/ https://newatlas.com/optical-illusion-raptors-airplanes/5675...