Feather sexing

So after a couple of google searches i decided to try my hand at feather sexing. How it works is there are primary feathers and secondary/covert feathers on the wings. if the covert feathers are shorter than the primaries at 3 days old then the chick should be a pullet. if both sets of feathers are pretty equal its a rooster. So with this knowledge i tried my hand at sexing them.

This photo to the right is the best example which shows that little yellow chick should be a pullet.

This next one was the

white chick. Little white chick wasn't looking 100% the last couple of days and passed away yesterday. This is its wing feathers which show it was likely to have been a rooster. this was my favourite chick.

the pale legged chick is also likely to be a pullet

and the last one pale yellow with orange legs should be a boy though its wing feathers were more confusing.

Only time will tell.