What is the primary method used to gather multiple hawks for hunting?

The primary method used to gather multiple hawks for hunting is to cast. This term refers to the practice of unleashing or allowing the hawks to fly out from a perch or a handler's arm to pursue game together. Casting enables more than one hawk to work in coordination during a hunt, which can lead to more efficient hunting and increase the chances of a successful catch.

The other methods mentioned have their own specific uses but do not serve the same purpose in the context of gathering multiple hawks. For instance, carrying generally refers to transporting the bird from one place to another, rather than coordinating them for a hunting scenario. Calling off pertains to recalling the hawks when needed, while cadging is often used for training or sharing food rather than actively gathering birds for a hunt. Therefore, casting is the most relevant and effective technique for bringing multiple hawks together during hunting.