Hello one of my hairless rats has had these weird marks appear on his teeth so far it only occurs on his top teeth. Any clues to what this is. My rat does have some developmental issues due to a head injury. I'm unsure if he is possibly not looking after his teeth or doing something weird. Or it...

Okay, so I tried to look this up in older threads and didn't really find info I was looking for. Maybe I didn't dig deep enough 😅 Anyway, I have 22 rats that recently turned 3 months old. I hand raised 9. The one having white teeth is one I hand raised. He(according to the vet) has permanently...