The other day I made more piggy eggs than I had budgeted for (what with the twins upgrades, I can't predict how many I'll end up with anymore), so I gave a couple of piggies to a friend who doesn't have very high Animal Kinship skills, I guess.
About a (real time) day or so later I go to his street and find that the piggies are hungry (that is, when I hovered the mouse over them they had fork-and-knife icons rather than pet-me or nibble-me icons). So I fed them some random produce I was carrying around. I've never seen this before, and I thought that piggies only get hungry if you use meat collectors (which my friend doesn't). I can't really tell, as I do feed the piggies on my street even though I don't use a meat collector (I like to think that my piggies have plenty to eat, whether they need it or not). But I've certainly never seen hungry piggies on public streets, and they presumably are not regularly fed.
Anyone know what's causing this?