The top and the bottom pics look like possible cockerels to me. Sorry I'm not good at Polish, but boy is that one a cutie! The one by the silkie also looks like it could be a cockerel but the little silkie looks like a pullet so far. It's hard to tell. The small brownish one in the second to last picture looks like it is a pullet. I could be way off I am just going by my own personal experience hope this helps you out some. You have got some pretty cute chickens there, I love the silkie!!