Which is better to raise ducks and geese?

Duck and Goose, Goose and Duck, Duck and Goose, Goose and Duck, Goose without Duck, Goose without Goose, Duck, Duck, Goose, Goose, Goose, Duck, Goose, Goose, Duck, Goose and Duck, you can't have both. The advantage of geese is that they won't get the disease of geese. The advantage of duck is that it won't get the disease of goose, which is of great benefit. But when bird flu comes, you will all die.