This sounds like a noble idea, but I'm curious what is prompting you to request this from us? Why just Hellman's and not other name brands? And why not ask for a mayonnaise that doesn't have any eggs at all? I don't know if you have Vegenaise in Canada, but it doesn't have eggs and it is incredible.
Edit: just for clarification, I am assuming you mean to ask for chickens who are not caged up. In the U.S., the term is free range.