There's a bit in Shirley Jackson's Life Among the Savages in which she and her husband are trying to find a house to buy in a small New England town (the one that eventually inspired "The Lottery"), and in one house's kitchen there are the long-petrified remains of somebody's breakfast, including two doughnuts. The doughnuts are not described except as "petrified" and "hideous" but they are evoked terrifyingly. The house is struck off the list, of course. In a mostly comical set of anecdotes, this one is really scary. Haunted doughnuts, for sure.

As for the squirrel, squirrels are extremely smart about food and the squirrel probably knew what it was doing.

P.