What is a cadge used for in falconry?

A cadge is specifically designed to be a frame or structure that allows falconers to carry multiple birds at once. This device is particularly useful during hunting expeditions or when transporting several birds to a hunting location. The design provides adequate space for each bird, ensuring that they remain secure and comfortable while making it easier for the falconer to manage them.

The other options provided do not accurately describe the primary function of a cadge. While feeding methods are essential in falconry, they do not relate to the cadge's role. Similarly, tools for weighing birds or specific training equipment serve distinct purposes and do not encompass the essential utility of a cadge in transporting multiple birds effectively.