QuickCheck: Do animals find electrical wiring tasty?

PICTURE this: you get home from work to see that your dogs have had a field day with the exposed cables at home. Or perhaps you want to start a car you have not used in a long time, but lift the bonnet only to find that rats have gotten to the internal wiring first. With wires so ubiquitous in modern homes and devices, even the slightest damage to any wiring can cause a big headache. Rodents are the main culprits behind such incidents, but dogs, cats, insects, and even sharks have been known to take a chomp out of wires if given the opportunity.

Is it because animals find cables tasty, or is there another reason for this behaviour?