Okay, these are some photos of one of my drakes that should have been grey. He looked just like the others when he was young (ie. regular mallard patten duckling), but after a few weeks he slowly started turning darker and darker. We call him "Metal Duck". His coloring is SO SHINY..... the grey on his belly looks like it's polished pewter. You can actually see your reflection in it at times! These pics don't do him justice! His pattern is just like "wild type", only everthing is a few shades darker. And the feathers on his upper back are black edged with brown. I don't think that this is what Holderread referred to as "sooty", do you? Any ideas?