I have 3 RIR/Australorp 1 month old chicks. They all feathered in very evenly with the exception of a 4th one which is still missing its shoulder feathers and has a much more prominent comb (couldn't get a picture of that little guy). Wondering what the gender is one the three "triplets". Thoughts? (I know its still early but its fun to guess ) This one has a bit more of a comb than the other 2 but other than that looks the same.