We got company

Someone at work has left a bag of cookes on the floor over the weekend. In shopping bag. Today, another coworker saw something was moving in the bag, but when he went to check it (poking it with a roll of tracing paper), nothing had happened. He told the bag owner, when he went to check it, he lifted the bag, and cookie crumbs fell through the shopping bag!!! SOMETHING had chewed through the shopping bag and the bag of cookies! It's obvious NOT the office dogs Cady or Maddie... How stupid do you have to be to leave a bag of food in the corner under the desk in a basement for a whole weekend? Guess you'd have to be pretty stupid, or you are just in love with MICE!