I got five RIR chicks recently but I am very unsure of their ages. I am also fairly sure that three of them are pullets and one of them is a roo, however, the last chick is confusing me a bit. S/he has a personality somewhere in the middle ground between the others and has a slightly more developed comb. I am fairly sure he is a he. I am fairly sure she is a she. I am not however, so sure about this one. And if anyone could give me a ball park on their age that would be great. This site has been amazing for figuring things out on my own so far.