green feathers

this spring i bought 18 straight run chickens of a barnyard mix, and i am having the hardest time sexing them. looking for some help as i have little experience in sexing chickens. they are all around the 9-12 week mark and a lot of them have big combs and some greenish feathering. (which makes...

Okay, I have a duckling that is making a girl noise, but has green feathers towards her tail. I think she is a Ancona, if that helps. She is around 6 weeks old.