Are there ways to sex a polish. I have a little one I just got. It can't be more than a week or 2 old. The little bugger is chest butting. He can see his reflection a bit in the clear plastic tub and keeps trying to chest butt his reflection even. My question in this, he keeps trying to get on the back of my silkie. Keep in mind that my silkie is now the same size as my 7 week old buff orpington. Is this a sign that maybe the silkie is a girl? Its a funny sight but I was hoping it was also a sign.