I don't want to be *too* obvious, but I'll bet PETA hates this with a passion usually reserved for mink farming.
They don't care much for diving mules, according to this...
http://www.peta.org/mc/facts/fsent7.html
Disclaimer: I am not a PETA person, I am a normal, animal loving person, and I would have to spend some quality time with the pig before rendering judgement about how it feels about what it is doing for a living.