Usually I throw unwanted scraps like hopefully-lethal-to-squirrels peanut butter and stale bread at the treeline which is about fifty yards across the lawn, on the theory that the rodents will learn to look for food there and stay away from the birdfeeder and house - it hasn't saved the feeder, but so far there aren't any squirrels pooping in the attic.......
That's good. We had squirrels in the old house we bought and when we rolled down insulation in the attic, we discovered that they peeled it all up and put it in a big pile. I guess THEY kept warm anyway.