My parents are at war with the Bears. A black bear makes a nightly visit to the bird feeder in their front yard, essentially destroying the little wooden box every 24 hours. My dad purchased The Steel Silo from the local feed store. It is an unbreakable steel tube of bird feeding goodness that the bear seems unable to destroy. As for my mom, she has to carry a can of this when she goes for a walk. The battle rages on.