We have 4 chicks from a breeder who tried feather sexing for the first time. It doesn't sound like she breeds for it, she just thought she'd give it a try. They're seven weeks old now and we think one is a cockerel and three are pullets. Four is hardly enough to judge any sort of accuracy though. I got some day olds from a different breeder and tried feather sexing myself but they mostly all looked exactly the same to me, so we'll see. Mostly I went by colours based on things I've read here for the various breeds we picked. Now that they're just over a week, I've made some guesses based on how they're feathering out and I'm curious to see if my guesses prove true. One of the breeds are Welsummers. I picked out two with nice, clear triangles on their heads which I'd read here often means female, but now one has lots of wing and tail feathers and the other is barely feathered at all. It will be interesting for me to see if the colouring or the feathering ends up being "accurate" as far as if the second is a cockerel or a pullet.