I have a friend hatching some SLW eggs. I've read on day 3 you can sex them by their wings, does anyone know about this process or if its accurate? I don't want to end up with more roosters I have to get rid of.
It can be done BUT only on certain breeds. I don't know the breeds, I just know it doesn't work on all chicks.
I don't believe it works in certain pure breeds, but rather is a trait that is bred for like other sex link traits. http://www.feathersite.com/Poultry/CGP/Sex-links/BRKFeathSex.html
It only works, and only sometimes, on specific breeds, strains, or crosses. If the birds aren't bred specifically for it, it won't work.