My senior cat, Spooky, had a bump on his spine. It would break open and be kind of a nasty looking little sore and then heal up, then start the whole process over again. The vet said it is a sebaceous oil gland and put him on a week of antibiotics. She said if that didn't work, he might need a minor surgery for it. The antibiotics did not work and we are back to square one. Ointment has not helped either. Does anyone have any experience with this or ideas about what I could try at home? Thanks.