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.
The wheat will sink to the bottom of the bucket and keep rats and mice from eating or contaminating the food. Without grass, a medium size goose will eat around 200g of food per day. Geese love greens such as cabbage, cauliflower leaves and lettuce.