Peri had one earlier this year on his side chest. I now take him to a holistic vet- Dr. Heller in Middletown, OH. He gave a topical salve called golden yellow. I was skeptical initially, but in a week, the tag fell off, there was some blood when it did, but after a couple of days it healed and is now normal. I also use Calendula oil (Herb Pharm, Organic Calendula Oil) on any bumps and they go away..it is almost like magic.