Xen- (prefix): Foreign or other. As in: 1  Xenoantigen -- An antigen that is found in more than one species.  Xenograft -- A surgical graft of tissue from one species to an unlike species, genus or family.
Diet. Snow Geese feed almost exclusively on plant material. During the breeding season, they eat many seeds, leaves, and roots of aquatic vegetation. The very young birds feed on invertebrates. Berries become more important in the fall. In winter, waste grain from agricultural fields has become a primary food source.
I'm new to geese but have been doing a lot of reading about them and whole oats is definitely the recommended geese feed. A little corn is okay during the winter months for extra energy but I think a lot of people over do the corn thing as a means to stretch their feed bill dollar. Translation: its cheaper. You might also want to feed gamebird or duck pellets.