My JC chicks are almost 2 weeks and already we have some that are about the same size as they were and some are almost as big as 2 week maran chicks (housing together for short period of time). They are on flock raiser which is about 18-20%. Is the size disparity becase hens are supposed to be bigger than the c*cks? Does that happen now our after they are finished growing? Help would be appreciated so I know if there is something else I need to do with them or start counting how many girls n boys we have. Thank you.