You will have to be pretty lucky to rule in this pin ball like stage. The key to get the three star is to figure out where to toss the big birds.
Launch your first shot towards the second wind blower. The bird has to kill the pigs marked with X in the picture, and fall to the left and kill the chained pigs.
First Shot Result
After hitting the platform, the metals fall and kill the bottom pigs. Now you have set up for your last shot.
With your second shot, launch the big bird toward the first wind blower, it should jump and head to the top.
Second Shot Result
The falling blocks and platform kill all the pigs and you will become a proud owner of three star rating for the stage.