He's yet to actually bite through braiding, but I know if he wanted to even the armoured stuff isn't a match (thanks for that lesson, Soup), so started looking at middle of the road ideas.
Split tubing. AND plastic cable braiding.
Looking at one particularly chunky wire layered up in unappetising plastic I started to think 'is this overkill?' before suddenly getting flashbacks to waking up one day to Soup chewing a brick.
Another layer of split tubing on the important bits, then.