Make the red bird hit the glass, between the towers on the right to knock down the TNT. Then the yellow bird knock down the pile that the first bird left. Fire the white bird on that pile as well, but be sure to activate the eagle right after you let off the egg bomb of the white bird or you will miss the eagle. Place the can of tuna on the right edge of the cliff the slingshot is on. It is the only angle I could find that worked. Those dang stone balls are the key to 100%.
I hope this helps you!