Social Game Fads: Enough with the cute lost animals already!
In this mechanic, the game will tell you that a lost/hurt/abandoned/wandering animal has appeared and you need to ask friends to rescue her. When friends click on the wall post that you make, they will get to claim the pet. Basically, the player gets nothing out of this except the gratification of 'saving' this poor adorable little critter and the feeling of helping their friends get a new animal. It seems like animals are constantly finding themselves lost and in trouble and in need of your help. Where do they come from?
In fact, Zoo World is built almost entirely on this concept. Animals are always appearing on your zoo and in need of rescue, and there is even a reward for having tons of people rescue your animal. Virtually every game is to blame for pulling on our heart strings and using the power of adorable sad animals to get us to post to our wall.