I have these three sikies all of whom I was sure were roos. Well 2 of them started crowing last week proving me right. What does the third one do? I walk up to it and it squats. I thought that can't be right roos don't squat. The next day it squats again. So I put in the pen with my resident stud muffin and he tells me yep it's a hen. So even when you think you have them all figured out and the signs all point one way, silkies will fool you.