Here is our Mighty Eagle Total Destruction video walkthrough for Angry Birds Bad Piggies level 21-9. (If you’re looking for the 3-star walkthrough video, click here.)
Bomb the ice on the left side with the first White bird, ricocheting into the crane above. Topple what remains on the left with the Yellow bird. Detonate the right TNT with the other two birds, then leave the sardine can on the rubble on the left side. The trajectory should be good enough for a feather. If you have an alternate strategy please feel free to leave a detailed comment below.