Hello Again Miss Lydia,
First question is; How big is your pen you keep them in at night? My ducks and geese share almost 450 sg ft at night.
And even through most of the geese I have, have known most of the ducks since day one of their lives. The new additional four ducks are the exception, it was the geese who accepted them quicker then the original ducks did.
My flock also has about 3/4 of an acre to wonder during the day, and has a small pond to play in. But as I said before "every situation is different". I believe it's all about how their treated from day one.
My eldest male (Merc) was hand raised for almost 9 days before any of his brothers or sisters came along, he almost daily hisses at me now, he tries to get at our new Saint, she just barks at him and the flock and dances around them. But they know if I'm weeding the garden or out in the yard with them if they start squawking and come by I'll throw some weeds to them or go to the porch and get them some corn to eat.
SO... geese you inherit yeah I'm betting it would be some time before you could trust them because their still trying to figure out if they can trust you.
But that's why we're all on here to talk to and learn from others who have or had some experiences with these issues in the past.
Good Luck KWS