Duffy sleeps, barks, and processes food into urine and feces. He is very good at all of these things. Blythe and Arianna claim that Duffy is very cute, and they can only stay mad at him for a short time after he pees on their bedding. Duffy will sleep anywhere, though he spends most nights with Blythe because she is most willing to put up with his seemingly endless scratching and grooming (not to mention fleas).