I got a batch of chicks yesterday to replace some we lost. They range between a few days old and a week old. One of them is a barred rock and it is so mean to the others. It pecks and "bites" the others...ALL the others. It even pecks me. It has thicker legs than any other chick I have and it is taller and skinnier than some. I really think it is a roo and since I live in the city am worried because we cant have them. What should I do?