Hi everyone! I just gor some black polish bantams,they are soooo sweet.Anyway,can I tell the sex of them at a dauy or 2 old? I have some white polish that are about 3 weeks old. some have a bigger "puff" on their heads. Are they roos? Someone told me roos have red combs,hens yellow. Is this true? thanks! I luv my peeps in Pa!