we have a silver laced cochin roo who ha s always gotten along with all the other birds including our brahma roo and our ancona duck pair. the last few days the ducks have specifically targeted him, they chase himm, bite him, corner him and attack him, they somtimes will not allow him out of the chicken house and they are ripping mouthfuls of feathers out of him. its awful! hes just staying in the house on the highest perch so they wont get him. im afraid hell starve, they wont let him eat. ive never in all my years seen anything like it. they share an enclosure, and ive known ducks and chickens getting along very well for years. they dont bother any other chooks , i dont know whats going on.