Our beloved 8-year old Buff Orpington, David Bowie, has a grey moldy-looking patch on her right cheek, just at the corner of her mouth. We just noticed it but it’s possible it’s been there for a bit. She’s also a bit thin but going through a “mini molt” so that could be a factor. Any suggestions on what the cheek patch is? It’s hard to tell from threads on here if it’s a canker or fungus. Thank you!