(falconry) Bits of bone and tough organic material from a corpse given to hawks to abate their hunger.
1486, Juliana Berners, Book of Saint Albans:
Oꝛ ellis take peꝛcelli Rootis and ſeꝛue hiꝛ with theyem in the ſame maneꝛ, and when ſhe tyrith holde rew ī yowre honde with the tyring and that ſhall make hiꝛ voide, bot it is peꝛlous to vſe it often that the Juce fall neꝛ ſpꝛyug in to hiꝛ yghes.