Recent Developments in Man vs. Squirrel

My dad may have finally defeated the squirrel(s). No, it was not the PVC pipe--though it may have worked if it was not removed for a more sophisticated tool. My mom kindly ordered a squirrel guard with which my dad is, so far, very pleased. It favors an upside-down funnel with a lip circumferencing (if that is a word) the bottom. When the squirrel tries to grab this lip in efforts to go above the guard and to the bird feeder, the lip collapses under the little creature's weight, and the creature falls to the ground. It has worked so far. After two or three attempts, the squirrel suddenly became content with feeding on the ground, at least for now. Recent developments may have unfolded without my knowledge. Unless I am informed of something different, think SUCCESS! The epic war may have finally ended with my father's victory at the Battle of Squirrel Guard!