We have 6 embden geese (two ganders) They have their separate run from our ducks (4) all of a sudden our main gander is attacking our male peking every day. He sticks his head through the fencing and bites and pulls his feathers. I cant understand why. They both have their girls and they have been raised together since they were little. The ducks were with the geese until they were 3 or 4 months old then we separated them by their own runs and houses. Why would the gander suddenly attack like that ? He is also getting testy with me as well, I have had to back him down twiice now. THe gander is 9 months old and his girls are 6 months old The same for the ducks. Any suggestions for this behavior would be appreciated . Micki