Our lovely Maine Coon has developed a black moustache. At first I thought it was dirt, and then after a while I thought he'd been fighting and got a scratch, but he has had this now for about 2 months, and I'm beginning to wonder if it's a bigger problem.
It does look like it might be dried blood, but it doesn't easily come off. It doesn't appear to cause him any pain and he is eating fine etc.
Recently had fleas (now treated and gone) but no other health problems and the fleas didn't seem to be a serious case.
I'm happy to take him to the vet (although he seems quite well), but wondered if anyone else had seen this before. Pictures attached.