The problem is that some are secondary in certain zones, but primary in others. So we can't list a simple "yes/no" -- we'd have to develop a way to parse the information per zone
in a user-friendly manner for both pet profiles and for our Pets by Zone feature. Plus we'd have to compile the list (and double-check it).
I'm not saying we can't do it -- I'm just saying it's not such a simple request.