Ok so my rat Timothy has this blood like looking stuff on his nose. I know it's not blood but I forget the name of it. Anyway I posted something on here before about it. But it just went away. It's back. It doesn't look to bad and his eyes coat ears everything is normal. He is eating and drinking and he runs around like normal. What can I do. Is it just normal for him or is it a URI or something else. Thanks in advance.