I'm not sure when this happened. I was away and only noticed it one night when he curled up in my lap and rubbed his itchy cheek up against me (blegh it was nasty). I cleaned it every day since - and was told to leave it. But now he's losing weight (he was BEEFY before and now he's looking like a more normal weight but for him it's skinny). I'm really worried about him and think he could use a boost from a remedy.