Hi, my cat is Harley. I've noticed these sores on his upper lip. The large one on the left is still bad but the one on the right has gotten worse. They started a few months ago and will be bad then heal then come back. I'm worried about him. I think the big one could get infected easily. I have no idea what could cause it. He's an inside cat with no other pets and the 3 of us dote on him. Any ideas on what it is/what is causing it and what I can do to fix it?
Thank you all.
Thank you all.
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