Well, I have had my share of rodent damage. Chipmunks are bad, that is why I have cats. They chewed the cap off the radiator overflow, that is an extremely hard plastic. I had heard that some wire harness companies used a lubricant to pull wires that was soy based. The picture of the cut jacket does not look like rodents, they don't chew in a straight line. Look how straight the three ribs on the top left are, and how are the two on the top right bit off? Wrong bevel.
