I have been training my Kestral to attack small UAVs. I started with small amounts of meat attached to a model quad ac and gradually got it used to the engine noise with the device on the ground. The bird now attacks the UAV whilst airborne with 100% kill rate.
Not sure where I go from here. A sqn of golden eagles for the bigger UAVs. May be pelicans for ASW and penguins for a land attack role.