This save is a test case for the bug here: https://dffd.bay12games.com/file.php?id=9701

This features a "fully functional fort" before any butchering.
There are 3 live animals that you can butcher, and when you queue them up they will be taken to the butcher shop in the barracks.
Eventually, their hair will reanimate, and eventually, the reanimated hair will become unkillable.