The smartest thing we have found to deter squirrels through the hen feeder is usually there are some feeders which can be deemed squirrel evidence. This link contains a bunch from which to choose: I insert a pinch of cayenne to include a touch of heat, if you want it https://sweet-paprika-whole76943.bloggerswise.com/37731098/the-red-chili-pepper-crushed-mixed-with-seeds-diaries