One more mystery!

During the winter I came home from grocery shopping, put the grocery away and had a brown paper bag with four loaves of bread in it. The freezer was full so I left them on the floor in the office. The office was a remodeled porch with no heat. It stayed very cold during the winter so the bread would be just fine. The next day went to get a loaf of bread and to my surprise two loaves of bread were eaten straight down so that half the loaves standing straight up was gone. We never did solve this mystery.