ok i will check her out tommorrow morning but telling by the pic what would be your best guess on the light one ?
flared neck feathers - Page 2
Featured Stories on BackYard Chickens
Males and females will fight with each other by flaring their neck feathers out and bouncing in the air. However, your red and white chicken in the picture appears to be a roo. Only males will get the dark red shoulder patches which your chicken clearly has. A full body shot is better but the one you posted is sufficient enough to say Roo!!!