The seventh level should be completed in two hits. The first should get rid of the pig in the rectangle, and the second should get rid of the two remaining pigs.
The first explosive bird isn’t too difficult to manipulate. However, the second bomb-dropping bird may take a few tries to get the hang of. Note that I moved the bird slightly in front of the structure, and used its upward force from the bomb-dropping to make the structure collapse. This is another one of those levels that may take a couple of tries getting used to.