[quote=“TreacherousCretin, post:5, topic:742809”]
At least one dog knows “Creepy” when he sees it.
(Short video absolutely SFW and Kids, click without fear.)
I think leahcim nailed it in post #3 above – at least as far as we can ascertain from a human perspective.
Most all dog owners will have an account of some non-threatening inanimate object or another that gets an undue reaction from their pooch – either revulsion/avoidance or vocalized protests (growling, barking). One of my dogs growing up was petrified of white plastic garbage bags. Another went nuts whenever he saw one of us wear certain hats (while other hats were totally OK).
I’ve seen both dogs and cats have some pretty stark revulsion to odors. Canned tobacco seems to be an almost universal pet repellant to my experience, with unlit cigarettes not being far behind. The family cats similarly regard sliced green vegetables (esp. green peppers and celery) with disgust.