Birdday Party 18-7 (or Birdday Party Cake 2 Level 7) is the seventh level in the second cake of Birdday Party.
Original Strategy (Strategy #1)
This level is a bit challenging for 3 stars and a lot of challenging for high scores. Launch the first Black bird into the top-right structure. Break the bottom-left corner to cause the structure to topple left. The bird will fall next to the main structure, and its detonation will do additional damage. Loft the second Black bird to land above the helmet pig. If any pigs remain, use the Orange bird to finish the level.
An another 3-star strategy is to arc the Black Bird high up and he'll land between the Small Pig and the three slanted rectangle stone blocks at the top left part of the middle structure (main structure). This will destroy the top of the middle structure and the blue party hat pig below with some lucky debris. Then, arc the second Black Bird into the top far-right structure. He'll fall along with this structure. Then, wait for him to explode automatically. This will clear the right of the middle structure and open the way to the Helmet Pig. Then, fire the Orange Bird into the Helmet Pig. Wait for him to inflate and pop the Helmet Pig along with some bonus points.
High-Score Strategy (Strategy #3)
This strategy is very very hard. First, catapult the first Black Bird to the stone triangle at the bottom of the far-right structure at the top. If you catapult him correctly, the Black Bird will have time to fall into the right of the middle structure (the main stone structure) and he will do serious damage at the right. You must destroy enough stone so you can open the way for the second Black Bird to explode the Helmet Pig. Then, shoot the second Black Bird to the left horizontal stone block at the middle structure. This will destroy the left part of the middle structure including the Helmet Pig. The level can be cleared with some lucky debris from the detonation but it'll better to throw Orange Bird just above the party hat of the first piggy. Then, wait for the bird to inflate and watch the rest of the level falling. Even when there are no more pigs at the second shot, this can be use for bonus points. Or you can shoot the second Black Bird to the thick horizontal block next to the party hat pig so the party pig and the small piggy will be popped including the Helmet Pig with the help of some debris at the second structure (counting from left to right). More informations please visit AngryBirdsNest.