Hi all: My family started its chicken raising adventure this summer with the mail order purchase of 6 chicks which were supposed to be all girls. We ordered 2 rir, 1 barred rock, 2 ee and a buff orpington. Unfortunately 1 rir died in transit to leave us with five. They are all now 13 weeks old. One of our ee is larger and more aggressive than the rest of the girls and we are afraid she may be a roo and need help to make that determination. Attached are photos. Please provide your opinion and why. If you need a particular view, I can take and post more photos, let me know. Thanks in advance for your help.