To get 3 stars on Poached Eggs Level 2-10, follow these instructions.
1. The pigs are enclosed in three sections. There are only 3 birds so use them wisely. Aim the first bird at the base of the leftmost, wooden structure.
2. Aim the next bird at the topmost part of the stone structure on the right. The bird will roll over the pig at the bottom section.
Here is a video walkthrough for Level 2-10