Bacon grease is a great preservative, LOL. My mother used to keep a Maxwell coffee can full of it by the stove for frying eggs, making gravy… the one day we got to the bottom of the can, only to find a perfectly preserved mouse who had been snacking on it and apparently made a fateful slip while perched on the edge. In horror, I about vomited… my father, on the other hand, used it as vindication for his smoked meat preservation experiments :-()