I'm sitting here and looking out my back window. I got a "Bullie" fat grey squirrel! I have suspended my bird feeders from a rope , between two trees cause between bears and other critters , they keep destroying my feeders. Now , this feeder is in the middle , some 25ft. each direction and about 20 ft. off the ground. Been watching the critters and thought I had the problem solved. On the rope , I got PVC. so when the squirrel walks the rope , it will spin and he will fall Yes..? Well , I got one "Circus Ol-le" squirrel.! He walks the rope as far as he can , about 4 ft length of PVC. then jumps on to the roof of the feeder and then bullies all the birds away..! One savvy squirrel..! Well , it is better than the bears , they eat the whole feeder , Eeeek..! Too Kool..!