I really can't offer any advice. Except watch your geese. We had to separate our ducks from the geese once they became older. The gander was trying to hurt the ducks. At the time we only had two ducks and 7 geese but fthe ducks were both female and had been raised from the brooder with the geese. What are the female geese doing. Our girls started laying eggs a few weeks ago and the gander went nuts He attacked anything that came within a few feet of her nest. Maybe yours has that spring mating hormone level too.