We have 3 Buff Orpingtons. Two have medium size combs and wattles, the third one has a little comb and wattle. One of the ones with the big comb and wattles, and the one with the tiny comb and wattles are laying eggs. (good girls!). The third one with a comb and wattles that looks like the other one, except...she/he is a tiny bit bigger...not even that noticeable, but is not laying eggs. Although...she/he is the leader of the group. We have 8 chickens all together. Since I am unsure...I am either waiting for an egg or waiting for crowing from this chicken...I wanted to know when chickens start to crow...She/he is about 28 weeks.