Yes,I usually start with chick starter feed and that's what I use fir commercial purposes. You know this is business, I am selling "weight". So there's no need using chick finisher feed, I haven't used it before because it's less nutritious to the starter feed.

On the part of using pig food for Broiler birds, I don't think I ever come across that here. I may have but maybe didn't notice.

Yeah, my birds roam a lot when they are still babies but when they are grown, they will much more space do that reduces their roaming about.