Others have mentioned a rodent ulcer too. He does have food allergies. But the food they are on now is a limited ingredient diet by natural balance. So who knows. The biggest ingredient is peas and pea fiber. His poop has become very stinky as well. We do have lots of different spiders...
Yesterday I found a fluid filled nodule on Charlie's chin area. I have not noticed it before. It's about the size of a pencil eraser head. I posted in another group and they thought it was feline acne. I have had Cats with it but they never had anything like this.
I noticed this morning...