FarmVille: Pregnant Pigs & Piglets
From the FarmVille.com News:
You can now get piglets from your friends by helping an expecting pig!
When tending your farm, you now have a chance to find a sow that is expecting piglets. This little lady will belong to one of your neighbors. The neighbor she belongs to is selected at random.
If you find an expecting sow, she must be returned to her owner. You will receive a pop-up that will allow you to post to your friends wall informing them that you have found their pig.
If a Neighbor has found a pig that belongs to you, you can claim your lost pig by clicking on the applicable feed that has been posted on your wall.
After being taken to your farm, you will receive a pop-up that will prompt you to place your little lady on your farm. (After all, a gift box is no place for piglets!)
After she is placed, you will see a message asking you to return in 24 hours. Upon your return, you will find that your pig gave birth to a healthy litter of piglets that you can now share with your friends!