breeder specs patched in last updates; old style wont work.
you now need at least 2 free 4x4 floor squares and 1 whole 4x4 upright to feed at annd food needs to be on same level as boars/wolves. Wolves being a lerger model need a bit more space.
https://steamcommunity.com/sharedfiles/filedetails/?id=2535802717
this how i modified by "broadbent" breeder.