i have a peking duck and a silkie that i raised together. i have another silkie chick and 2 sex link (red n black) raised together. they are all in a whelping pen... i put up some chicken wire inbetween them both.... and today i decided to take it down cause all the chickens are the same size. the ducks.... well a lot bigger lol!!. so now the duck has been chasing the other chickens and nibling on their feathers.... they screach a little but no harm done... she just doesnt let up... is this her being vicious? or are they establishing the pecking order?