I have a Greek tortoise and i've had him for about over a month now and i've read everything about his breed and care taking. I have recently noticed that he has a runny nose,(he blows snot bubbles) and i heard it might be a nasal infection. He is very active and clumsy. As in he tries to climb the glass and ends up falling over really hard. Thats when i noticed that around his mouth is ths rustic looking stuff on the side of his upper jaw. Very concered for his health and any help would be much appreciated.