I got my squirrel proof feeder at the agway. It is the kind with the counter weighted perch. Anything heavier then a bird gets on the perch the door to the seed closes. You can even set it so if you have a problem with heavier birds like gackles or blue jays it will close on them too. Occasionally I get a squirrel that tries for it and gets nothing for his troubles. My dog helps to keep them at a minimum as well.