I have 17 KCs, they are, mmm, days shy of 7 wks old. They range in a huge electranet with pekins of similar age. We've noticed that there are 2 ducks that continually harrassment and grab the breast feathers of 2 other ducks and run them through the field. Some are missing feathers from the harassment. Is this sexual maturity, male v. female or just ducks being ********. I can't see a real difference in coloration. the smaller of the 2 is the aggressor it appears, I cannot tell any other distinguishing characteristics.