The no-squirrel zone

Squirrels and I don't get along, especially when they enter my yard. The way I see it, guarding against squirrel invasions keeps our family safe. Usually, squirrels try to infiltrate our yard to snatch food from our bird feeder. When I spot them along the fence, I bolt like a gazelle and chase them until they're out of site -- high up in the trees. Who says Labs don't make good watch dogs?