My silkies, including the black ones, had blue ears, but they always laid off white eggs. My red and partridge cochin chickens laid brown eggs.
I kept a few of the very first eggs (I dried them out). They were so very very tiny. Some looked like marbles. As the birds got older, the eggs got bigger until they almost were the size of small grocery store eggs.
My head rooster was my black silkie. He was a good rooster. He was also very good with the chicks. But I ended up with a lot of silkie/cochin mixes.
