My cat is 15 and and has had what I can only describe as some sort of wart looking bump on her skin for years and years. However 4 days ago I noticed it had freshly burst and there was a small amount of very mad smelling pus coming from it. 2 days later it had scabbed over black and some of the pus had turned black as well. It still has an odour now and my cat seems to be slightly sleepier than usual however I’m not certain whether that is me just imagining symptoms. Would really appreciate some help. Attached are the photos first: from when I initially saw it and second: 2 days after and how it still look at present.
