So in all likeliness, my cat has some form of auto immune deficiency. Exciting? I think not. My cat gets these sores on his paws, see, and they stay there for a while. The last time he got these kinds of sores, well the least two times, I took him to the vet where he received an antibiotic injection. I’ve taken him twice and the second time, his sores cleared up slightly, and then returned far more fierce. Recently we made a decision to keep him comfortable until necessary to put him down.