Some where I read that the sex of a very young chicken can be determined by the tail feathers. If the tail feathers are protruding outward it's a pullet. If the chick has a little rounded butt, very short or no tail feathers it will be a rooster. I tested that info out during my last hatch and you know what? It was a really close call - out of 7 chicks I was able to correctly identify 6. I have 41 eggs in the incubator due to hatch June 3rd. I'll band these little guys and gals according to their tail feather presentation and more accurately test this info. I do not remember where I learned about this procedure for sexing baby chicks - if it turns out to be correct it will be a whole lot easier than the other methods I have read about. If it's correct you can identify the pullets in a straight run and save a little money.