I had almost this exact scenario, except my geese were both male. We got one goose (Turbo) to guard our chickens, not realizing he needed company. Three months later we got him a little brother (Wally) and because of minimum orders we got a pair of ducklings. To this day Wally and his duck cousins are inseparable! My plan for Turbo to have company completely backfired because Wally bonded to the ducks he was raised with. (Turbo bonded to me because he was hand-raised in the house. He'll still come hang out inside but treats at bedtime are incentive enough to get him to his pen with his brother.) All have worked out a pecking order by now and the ganders, who did hate each other in the beginning, acclimated to being roommates after a couple nights sharing a pen. We have a turkey, 13 chickens, two ducks and two geese. All range together during the day. Geese and ducks are penned at night and the chickens and turkey share a coop. All get along. They are fed together in the morning, share a kiddie pool. Raising them and socializing them seems to be a lot of the key.