For those of you with Seramas: can you tell if they are A or B size when they are very young? I have only two that hatched and one is quite a bit larger than the other. I also have two that I got as chicks and they are a mystery as far as size. I know that they are a month old and smaller than the silkie chicks that are 3 wks old. Do I need to wait until they are so many weeks old to weigh them?