hello! We recently bought 10 baby chicks, 2 of each breed we wanted. I've noticed one of the olive eggers has a completely different stance then the rest of the chicks. I know I've read on here (what a great place this is!) that when the stand upright like this they could be boys. They are only about 4.5 weeks old maybe 5. His "sibling" the other olive egger is the grey one in the pictures. The grey one feather in quickly but as you can tell with this one it still barely has any feathers and has a more upright lanky posture. Are these signs of a roo?