The term "warts" may cover a variety of skin lesions. I would suggest that the first approach should be surgical, and get a proper diagnosis from a veterinary laboratory. Cryosurgery ( freezing) may be an option.
WE HAVE A 9 WEEK OLD LURCHER PUP. WE HAVE JUST NOTICED SHE HAS ABOUT 20 LITTLE WHITE WART LOOKING THINGS ON HER FACE,EARS AND UNDER HER CHIN.DOES THIS SOUND LIKE WARTS??