First, religious texts condemn them as unclean, plus the love Westerners shower on pets made them inherently suspect.
He who mixes with unclean things becomes unclean himself; he whose associations are pure becomes more holy with each day.
You shake your heads; then why do you stare at me as though I were a thing accursed and unclean?
Certain physiological processes come to have for him an unclean flavour which is yet perniciously attractive.
But a pig is only the unclean animal—the forbidden of the prophet.
I did not drink wine; I was not allowed to smoke at home, because it was an unclean habit.
Woe betide—but, was there ever such a gathering of unclean, unholy humanity?
Behind her walked a proud gentleman, a lordly gentleman who elbowed his way through the throng as one who touches the unclean.
He must stand aloof, crying "unclean" in his soul if not with his voice.
On the contrary, they are described as unclean Pagans, who ate all sorts of meat, and some of it raw.