Well, I'm new to hatching chicks, but it would be great if that were true. I hatched 5 Wheaten Am over Welsummer chicks a week ago. All were hatched with yellow legs. I sold two yesterday (without noting their leg color). But of the three I have left, two have developed green legs and one is still yellow. In a few more weeks I can tell you if that's true or not!Someone on the FB page just told me you get sex linked chicks when breeding a slate shanked ameraucana roo to a yellow legged welsummer hen. Pullet chicks will all have slate or willow green legs and cockerals will have yellow or white legs and gave a genetics reference: http://www.edelras.nl/chickengenetics/mutations2.html Knew some others had am roos and wel hens so thought I'd share.