My dad had trouble with squirrels and his feeder, too. If he hung it from a tree, they'd climb down the line to the feeder. So he put it on a tall pole. They'd try climbing up the pole, and sometimes be successful. They'd also climb up the nearby trees, go out on branches, and divebomb the feeder. These were 50-feet tall trees and the branches were nowhere nearby. Those guys are determined! They also burrowed holes into the trash cans.