This is Salem (plumper older pic to introduce him properly he needed a good picture included.) He is a ‘grumpy’ 15 year old man to the teen kittens. He just went to the vet a month ago because he was peeing out of the box. He had a blood panel done 3 months ago and his kidneys are starting to fail (see old) but otherwise is in good health. He lives with my mom & I'm visiting with my twerp Jackie. Tonight I noticed his chin had a scab (a fight I thought at first) but no he has scratched his chin bald, no idea why & wasn’t noticeable yesterday. No fleas. indoor kitty, no desire to venture outside ever (unlike the kittens.) Otherwise he seems fine (underweight but fine at least he gained some weight back.) Any ideas? (On the first I will buy him some chamomile tea, and apply it to his chin to see if it helps.)