The transfer of non-native & exotic game animals across state lines is how Texas ended up with a feral hog problem.
People in the late 1980’s into the 90’s were illegally importing exotic Russian boars into Texas. Some to high fence ranches where they escaped, others onto regular ranch lands.
These Russian boars bred with Texas feral hogs which up to that time frame were domestic breeds.
Now, instead of the normal feral hogs breeding once a year they now breed three times a year.
*People did serve state jail time when caught illegally importing the Russian hogs.
I am not sure I accept this account. There have been feral hogs in Texas since the Conquistadors brought in herds of them in the 1600's.