Our chickens are 7 weeks old right now, and we are almost completely sure that 3 are pullets, but the last one (a silver-laced wyandotte) is still questionable. At what age do their comb and wattle begin to really grow or turn pink, and at one point should they be fully grown? Is there a difference for hens and roosters? Does it vary between the breeds? We would especially like to know more specifically about the silver-laced wyandotte, if it is different than other breeds (we also have a buff orpington, plymouth rock, and new hampshire red). Thanks!!!