Geese are very close to each other , they will pine. I would wait until the others come and see what happens then. Geese dont fight to draw blood just chase around, so there should be no injuries. How much space do they have? to me geese should be free range. If they are they will form groups in summer but gather together in winter.Geese are a loyal family bird , they should settle down easily. If your geese are free range they should not need feeding at all. I only feed mine when the ground is frozen. Feed seperately if you have to so they know there area. They should settle,ganders do not fight they will warn others off a nest but will live quite happily in groups together, not like cockerels.Good luck.