I'm not sure yet if one is a roo, but the behavior is weird. My hens are around 13 weeks old, and this little chicken comes out of the coop and try's to line up the others and will stretch his/ her neck and spar with another chicken several times . I noticed today the chicken was trying to climb onto another chicken, is this roo behavior? If so he has not crowed and it keeps me wondering what it's all about.