This level can be complete with 1 hit. You will use the red bird to hit the rock, and causing the left structure to collapse. That will tilt over, and take out all the pigs. You will most likely have to hit the rock on the upper left side to cause everything to collapse and pop the pigs. It might take a few tries to hit the rock at the right angle.

[youtube width=420 height=345 time=3]http://www.youtube.com/watch?v=P4pfpIF8E0g[/youtube]