The rights to private ownership and use of animals differs depending on whether the animal is considered to be wildlife or livestock. As both feral hogs and Russian Boars are considered to be livestock in Texas, their ownership is generally assumed to belong (de facto) to the private citizens who control the land that they inhabit (Texas Legal Code, 1993). Differing opinions of ownership for the hogs results in management conflicts; these may be both inter- and intra-managerial among production units.
http://agrilife.org/texnatwildlife/feral-hogs/economics-and-human-interactions-of-the-wild-hog-in-texas/ Best I could find right now. I remember someone(maybe Silverton) posting about how wild hogs now belong to the land they are on. If so a landowner can protect the hogs on his property. Curs baying and biting at the hog would be considered attacking to most people. Wish I could find that post.