The European Bison and Wild Boar species mixture has already been tried in several zoos, f.e. in Györ Zoo and Nyiregyhaza Zoo in Hungary, the latter one still exists.
However the bisons can be mixed with different deer species and Mufflons as well, they are always a risk factor in a mixed-species exhibit, just see the lethal injuries caused by them: a Mufflon was killed by a bison in Safaripark Beekse Bergen and a Wild Boar at Alpenzoo Innsbruck.
