Nobody would believe it. They'd accuse you of faking it a la Milli Vanilli. You have a talking dog, a literal miracle, and yet people would mock and criticize. Depressed, you'd turn to alcohol. The good shit, sure--that dog made you a little money, after all--but paying more for your poison only makes it drain all of your resources that much faster. You're a husk of your former self.

But you've still got your dog who still loves you unconditionally, against all odds. :)