Ivy is 5 or so weeks old now and has a much more developed comb than any of my other chicks (a buff orpington, red sexlink & polish), is taller and lankier than the others, and has started jumping on top of the other chicks. Not aggressive but very assertive. This may just be what marans look like at this age though, not having had one before. I've never had a roo and am really hoping she isn't as my daughter picked her out herself from a big tub of marans. She was the smallest so we hoped she'd be a she. Any thoughts on this or is it just too early to tell?