Son has 12 y.o. fixed female cat with swollen area on her lip for approx. 1yr. Two months ago she developed a black scab on the end of her nose. He has been trying to help her with prednisone & doxicycline 2mos. Nose tip is gone but appears no worse. What could this be?
I recommend a biopsy so a diagnosis can be made and proper treatment can be applied. This condition has been going on too long. Good luck, vetcare