Go buy this book. Bill Adler, Jr. is my hero. I would like to hear your story for the next edition of Outwitting Squirrels . Revised and even craftier than the first edition, which has sold over 300,000 copies. If you feed birds, or have a garden, you already know the answer to that question.
Squirrels are very efficient about breaking into feeders.
They have nothing to do all day long except to try to attack feeders and gardens. They don't go to work, they don't watch television, they don't have to rush home and cook. Squirrels simply have one mission in life, and that's to break into feeders. To outwit squirrels you have to be willing to spend time and effort. For nearly every strategy you come up with, over time, squirrels are going to undo that strategy.