Did your chicks start out with yellow legs? I didn't take pictures of mine when they were younger, but I swear they were more yellow then and all but one are becoming dull. Nothing I'd call out right green, like on my EE's, but maybe they're on their way? I'm focusing on them for dual purpose too, but I like that they just seem naturally tamer than my other chickens. I don't spend any time trying to tame them either. I provide them with loving care, but they are not pets. Even the Delaware chicks are more relaxed than my previous hatchery chicks and the one Australorp that hatched with them. (That little bugger runs up and bites me every time I top off their food or water!)