Hi everyone, I desperately need some help sexing my favorite chook 'buffy'. She/He is only 3.5months old but already towers above the others. She/he has spur bumps (as all chickens do), but they dont stand out all that much., and dont seem to be getting any bigger. The tail feathers have a green gleam to them, but arent especially long. There hasnt been any crowing or even attempts at crowing that i have heard. Any ideas would be greatly appreciated!!!