we used to make mock hunts and staged pigs for winding situations back then we used 60-80 pound shoats because they were easy to handle. didn't have a bay pen in those days. i reckon we didn't realize it at the moment but we were training and/or encouraging the dogs to catch the smaller hogs. the freezer was always full of pork.
once we built the bay pen and put a big boar in it we caught mostly boars and i don't eat boar meat...
that was when my brother hunted with me and he got out in about 1993 because his line of work changed...you want to catch the big ones train with a big boar in the bay pen...