A terrible smell like sauerkraut has appeared in one area of the kitchen in my parents' mobile home. They thought a mouse died, so mom cleaned out all the cabinets, and behind the stove & refrigerator yesterday. No luck. Today, I went underneath their house to look for a dead animal, but found nothing under there. Above my head,I noticed a rip in the plastic covering over the insulation next to the source of the odor. I suspect is a small critter got in there & died, but I was afraid to rip open the plastic because I didn't want a dead critter to fall on my head. I also didn't want to leave the insulation uncovered. Any suggestions?