This is at its best when it weighs 10lb or 4.6kg — i.e. when it is six to nine months old. A goose can be utterly delicious, but make sure that you choose a young bird as old geese can be very tough. Fresh goose has a clean white skin which is soft and dry to the touch. 10lb/4.5kg will serve about six people; 15lb/6.9kg will serve 9-10 people.