I recently heard about two new ways to keep squirrels out of your bird feeders:
1. Add hot sauce to the bird seed. The birds don't have the same taste receptors as mammals, so it won't bother them, but squirrels will run away with burning little squirrel tongues.
2. Buy one of the new bird feeders with a built-in motor that spins the feeder when a heavy animal lands on it. You might scare away a few doves, but nothing is more hilarious than seeing a squirrel hang on for dear life as he spins in circles and then is sling-shot 10 yards from the porch.
Annie in Austin reports that the hot sauce doesn't seem to work!
You can watch spinning squirels on the website for yankeeflipper . This is the company that made my mom-in-law's feeder. They sell them at various retailers and you can find out where from this site.