The group is 18 weeks, & I have 3 barred rocks. 2 are obviously male, but 1 just doesn't have as large of a comb, and doesn't have any large tail feathers like the other two. I know the saddle feathers should be a dead give away, but while they don't look the same as my other pullets, they aren't outrageously pointy. Blah, I can't tell. ^My questionable one. ^Vs one of the obviously male BR, who actually weighs less. I can go out & take specific picture of certain areas on the chicken, just let me know. Things have started crowing in the last couple of weeks, but I haven't seen the questionable one do it.