HELP. My little Chip has a big "blister" on his mouth or upper lip (if he has any). I have an appointment with the vet tomorrow afternoon. I am just wondering if anyone has seen anything like this? I can't tell if it is a gum problem, tooth problem or maybe he has a quill stick in his "lip" and it is infected. It is a big puffy thing and looks like it is filled with blood. Any ideas what we might do before we can get him to the vet??? thanks.