I’ll raise all your rodents to a ferret/polecat who took up residence in a car’s inner wing I was storing some years ago. I caught him on film using a motion sensitive camcorder.
He was limbo dancing under the up and over garage door.
Found mice droppings in the engine bay when the car was garage stored over winter last year, i left the bonnet up and fixed a battery powered motion sensor light to the rafter above the engine bay, no more droppings, done the same this year, still find droppings in the garage but none in the engine bay, guess leaving the bonnet up makes it less cosy maybe.
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Check the brake hoses!
A neighbour has an old auto Merc tucked away in a corner of his drive. It looks almost new, but it’s been there a couple of decades.
Last year we lifted the wheels onto trolleys (nightmare) and pushed it out to get at the paving and noticed some old stains left behind from each wheel.
Most of the brake hoses were well chewed and no fluid in the reservoir, but nothing much else seemed damaged under the bonnet.
I could have taken some photos, but felt it might not be tactful.
SWMBO suggested squirrels rather than mice, because they chewed all our rubber ties holding young trees to stakes! But the tooth marks were smaller than a squirrel’s fangs.
All rodents have teeth that continuously grow and they have to gnaw on stuff to keep them down. If they don’t their teeth grow to a size where they can’t eat and they starve to death.
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So true - just wish they wouldn’t do this vital task on my car wiring! 
