JJACK -
I can understand your skepticism about there being a difference of wild hogs vs feral hogs in North America, but there is.
The original wild boar stock from Germany and the Russian Caucasius were stocked into a high fenced preserve of 19,000 acres in NC in the 1890s, outside Asheville. After the owner aged and he and his friends stopped hunting the game (Red deer, boar, and other European game), he left the estate to his gamekeeper, who was egged on by local friends to let them hunt it. The yokels chased the game into the fence and the hogs tore it down and escaped, populating the western mountains of NC, SC, and Tennessee. TN has a mix of some feral hogs interbreeding with these hogs. NC and SC have a pretty pure stock in the mountains, with more feral hog interbreeding as the hogs migrate down the rivers into the Central Piedmont and midlands along the Savannah, Saluda and Broad rivers.
I can send you some extensive studies by biologists. Now, with DNA processing, it is possible for new studies to match them up to the strains of European stock, if someone wants a PhD thesis topic.
