Is it common to get ducks from a hatchery that a quite different than the breed they are supposed to be? I have five mallards and one is smaller and colored different than the rest. She has a white ring around her neck and a lighter colored breast. She is lovely, but definitely not a pure mallard. I also have four cayugas. One has a slightly different body shape and is a brownish-black with none of the beetle-green that is characteristic of the breed. She is in the middle of the pool in this picture.