I heard about a guy that had a sweater knitted from wolf hair. He didn’t have to get down on all fours to get a reaction from dogs. I imagine someone could make good money selling similar sweaters to mail carriers.
I am an avid crocheter and crafter and there are places where you can send your pet’s hair to be made into yarn for your use.
Between two cats and two dogs, I could clothe the family, LOL!