A farmer will come across an expectant pig on their farm and be prompted to return the pregnant pig to their owner (it appears most owners are currently inactive FarmVille players). The farmer then posts to the owner's wall asking them to claim the pig.
Once the owner of the pig claims them, they place on their farm and return 24 hours later for the birth of the piglets.
When the piglets are born, the owner is then given the opportunity to share with neighbors via the neighbor selection process, similar to gift sending. There is no public post to the wall, so the owner will need to select the individuals they wish to give the piglets to and the recipient will need to accept via gift request page.
This article originally appeared on FarmVille Freak.