I'm wondering if it might be a good idea that piggies - when they have been pet and nibbled, might show a slight aversion to a glitch. Not a run-away sort of aversion, but showing, perhaps, less neediness while I pet their kin, or less of a tendency to walk back into their plops when I am examining their poop.
It would be especially helpful when tending to my pen full of critters, my affections might be more fairly distributed if the ones who have been already loved up might step back a little bit.