So this morning I woke up and looked over at my tortoise tank (it is in my bedroom). And first thing I did was go over and turn on the light and I saw that my male tortoise was already out next to his log, and he was just stairing at the glass. I put my hand in there and pet his head and he hissed at me!! He HISSED at me!!! I am so worried that something is wrong with him, he doesn't do that to my other tortoise at all and actually is quite fond of my female tortoise. They both are only 3 years old and he has never acted like this before. I'm worried of all the possibilities of sickness, agression, and everything else, he has been keeping his mouth slightly open all day... please comment!!!