The Meat Truck

Did anyone notice what the meat truck said on the back? I'm not watching it right now, but it said something like "Hi-Pro Meat Packing Co., USED Cows"! I thought that this was really strange when I first saw it (as I didn't know what was going on at that point in the movie). But now it seems just as strange. Of course it fits into the theme/plot of the movie, though I don't think that anybody was being recycled Soylent Green style as it seemed someone was suggesting in another thread. But now it is just this bizarre yet obviously fitting detail that I notice.