Well, we're pretty sure this chick is a ROOSTER! I don't understand why the feathers are still growing in so slowly, but I think HE is definitely a he. Body is large and very dense and heavy. The legs are a bit longer, and thicker. 'He' also acts very dominant towards all but a couple of the hens. 'He' has always been very timid towards me, and would freak out when I picked him up. I try to catch and hold a couple times per day, to help 'him' to be a bit tamer. Oh, and the comb and wattles are RED and more developed than the other chickens. What age do roos commonly begin to crow? My chicks are 5 weeks today. (Wednesday) Here 'he' is: Let me know what you all think!