Sexing Coturnix Quail

[SouthCoastEasterEgger]

Hi, I hatched seven quail from eggs I purchased from a farm. They are about 2.5 weeks old now. I identified the sex of four based on the rust vs white/speckled chest, but these three don't seem to fall into that feather pattern. I was wondering if there was a way to sex these chicks by feather pattern? Or if I will have to wait to vent sex them later

Thanks!

 

[Nabiki]

These do not look like feather sexable colours. You'll have to vent sex, but you'll probably start seeing eggs or crowing by then.