My parents love to put out bird seed but are in a constant war with the squirrels. Once, years ago, they went on a long vacation. The squirrels didn't like tha

My parents love to put out bird seed but are in a constant war with the squirrels. Once, years ago, they went on a long vacation. The squirrels didn't like that the humans weren't setting out the buffet, so they broke into the food storage: a bog-standard rubbermaid style 55-galon outdoor trash can. They chewed right through the lid. Solution: replace with a bog-standard metal outdoor trash can. After the next vacation, my parents came home to find tooth marks on the lid, signs of an attempted but thwarted break-in. Battle: Humans. War: On-going.