The goldfish were just used to cycle the tank. I havent removed them as they seemed to be irrelevant and dont bother anyone. He does not eat them.
I will pull him from the tank and post photos directly of the spots I see issues with.
He may not now but can at any moment, which, given his condition may not be all that terrible; it's just if he starts eating live, you may have problems weaning him off, plus goldfish are a bad diet (fat + thiaminase, people say).
I'd not put him through any stress unless you deem it absolutely necessary and a risk-to-life situation. He needs stress-free environment and good diet and lots of WCs.