Cat has this spot which just appeared and we noticed yesterday. We were gone for the holidays and got back on the 28th. We noticed this spot on her back yesterday Jan 2. Her brother, same age, has no spots and does not seem itchy. She also does not seem itchy and doesn't care about the spot. In the attached pictures, it's the same picture but I just tried to highlight the circle where it seems to be a bit more ruddy/crusty. It's not that bad, it is not bright red . Just a little more dark, like eczema.
By the way, they are both 5 years old, indoor, standard tabby cats. They have been on revolution plus flea meds for their whole lives. No change in diet but I did give a small portion of a new protein and brand two days ago, which my cat with the spot did not seem too interested in. So, I doubt it's an allergic reaction
