I have 5 chicks that are 4 weeks old and 2 are suspiciously roo. So if I replace them, is it better to replace them this year with a few new ones and add them all togther as youngsters this first year (I would brood the little ones alone first) or would it be ok to add new ones next year when my girls are a year old? I want to replace them now.. and my hubby said wait til next year