These are 4 month old RIR and supposed to be pullets but I suspect the one in the 1st pic and the one in the foreground of the 2nd pic (same chick) is a roo. However his comb is not very red but his legs are very thick. Plus her/she is very aggressive. The little one in the 2nd pic is the same age and she is the runt of the bunch. Please advise. I am not a very good picture taker. These are my first pics posted here on this board.