when will i be able to tell if the "mystery" chicks i got from tsc are roos? they are going on 6 weeks no attempts to crow as far as i know, but my chicken knowledge is very limited!!! also what types of pics will help you guys tell me? full body? head shots? ugh,its now been guessed i have 2 roos out of the 3 i have! so if the 2 are roos id like to know asap,so we dont get anymore attatched! (and so i can go get more if i need to!)