What does the term "cast" refer to in falconry?

In falconry, the term "cast" specifically refers to a vomiting action that raptors may exhibit to expel indigestible parts of their prey, such as bones, feathers, or fur. This natural behavior helps maintain the bird's health by removing material that could cause internal issues if left in the digestive tract. Understanding the cast is essential for falconers, as it indicates the bird's feeding habits and digestive health.

The other options do not accurately capture the definition of "cast" in a falconry context. Feeding methods, gatherings of falconers, and hunting flight styles are distinct aspects of falconry, but they do not relate to the specific meaning of the term "cast."