^
If you ask Nike/CONS/Adidas if their shit is made in sweatshops, they will reply and tell assure you that they don't. It's more about not wanting to lose potential customers, if they admit that they use animal-based adhesives. I doubt you would even get a straight answer, if you asked your shop's rep, but it wouldn't hurt trying.
SoleTech, Huf, State and Lakai are pretty good about it in their catalogs, as well as customer service...well, actually Lakai ignored me, so I got a pair of eS, instead, which was about 7-8 years ago.