An AP story on ABC13's website says that the Humane Society of the United States (which they list as the United States Humane Society in the story) has sent a complaint letter to a big pig farm for the practice of "thumping".  Thumping is where an unwanted baby pig is slammed head-first on a concrete floor until blood runs out of it's nose and then it is left on the floor to die, sometimes very slowly.

It seems to me that there are more humane methods of disposing of unwanted baby pigs, at the very least, something quicker.

Since it is only a letter of complaint from an outside organization and not an investigation by local authorities, I doubt anything will come of it.