I just heard from Plymouth Animal Control that they were left in a cage by the side of the road and there are actually 4 pigs. They're now advertising them in the local paper (!) but I asked them to hold them until I can figure out transportation.
Aren't they? A volunteer at the shelter told me the adults are now separated (still don't know the sexes). It looks like a male female couple with two babies to me so I hope the male and female are separated. Hopefully I'll have a happy update soon!
I called and left messages on the shelter and volunteer lines. Also talked to the police, who said they couldn't help. If no one calls back I will try again tomorrow. Let me know if anyone else has news.