Just to clarify, Meyer does sell Easter Eggers, not “AmerIcanas”There was a couple of questions there:
1. Your EE is crossed with something that has feathered legs. I'd wager there's a marans back in his history somewhere
2. Hatchery birds can and will go broody. It all depends on the breed. For instance, Brahmas, hatchery or not, are more likely to go broody than leghorns.
3. If you cross a wellie and anything then it becomes a hybrid or a cross breed.
4. Did you get your Americana from Meyers? What type is it? I'm concerned because while Meyers does sell true Ameraucana, (note spelling) they also sell AmerIcana which are little more than easter eggers with a fancy name.