I have three growing chicks that I need to sex as I can't keep roosters in my area because of the noise. One is a Lavender Leghorn, the second is, we think, a Silkie cross (has Silkie feet) and the third is a hybrid of some kind as well. The leghorn hatched on 5th August so is about 3 months old and the other two hatched around 17th August, so are just over 11 weeks old.
This is Number 1 (I'll do separate posts for the other 2):




This is Number 1 (I'll do separate posts for the other 2):