Howdy folks, I received 18 cute little chicks about 3 weeks ago. I ordered 10 Amercaunas pullets and received extra "... males to keep the chicks warm." Problem is, I can only keep 5 (preferrably females) and I have no clue how to tell the difference other than colors. A neat observation, some of them hav greenish legs and the others have the typical yellowish. Any ideas on how I can distinguish my females from the others, preferrably before they reach full size?