One strategy for Hogs and Kisses level 2-1 (formerly level 16) is to fire the White bird below the clouds, bombing to ricochet the bird into the cloud supporting the TNT. Use another White bird or two to bust all clouds supporting the main structure. Watching the video, you can see how much of a domino effect is possible here! The score in the video below is 108,440.
Note: In a recent update, the level numbers were changed from Level 16 to Level 2-1.