scratch

Hi all, I’m a first time rattie owner and just noticed that one of my rats has a scratch under his eye. It doesn’t actually touch his cornea, just the skin under the eye, but I’m wondering if this is something a vet needs to see? He’s squinting a bit, but besides that there are no other...

Recently while I’ve been hanging out with my rats, one has been trying to lip the inside of my lip by pulling it down. Sometimes she scratched the inside in the process. I’ve heard rats like blood so is that why?