The birds were being thrown by Terrance and the slingshot.

Red: Do you think you could throw me far enough to hit that giant boulder?

Terrance: He nodded, pulled back, and fired

Red: AAH- He got inside the castle

Chuck: Launch me exactly the same way you did for r- EEAAHHH!!! I WASNT READY!! He got inside the castle too

Stella: Whos gonna go next?