I have one of those feeders also. Only one squirrel has figured it out so far. I can tell when he comes across the lawn because the neighbor's cats take off running. Biggest darn squirrel I've ever seen. It must be all the striped sunflower seeds he eats every day!
Anyway, chasing the cats and entertaining us by hanging upside down and fishing the seeds out without tripping the bar is worth the cost of the seed.
