I have 2 Golden Sex Links and 1 Americana. They are all 20 weeks old today. One of my sex links has been laying eggs for 4 weeks now, but the other two are not. The chicken that is laying has a very large, red, well developed comb and wattle while the other chickens combs and wattles are small and pinkish - kind of pathetic looking compared to the other chicken. Does the size and color of the comb and wattle have anything to do with egg laying? Will the other two chickens combs/wattles eventually get as big as the 1st or does it vary between chicken or depend on the breed?