Could there be something else wrong with him that hasn't been diagnosed yet? If he's in pain somehow, that would make anybody aggressive. Or if he's lost some sort of sense making his world seem very unbalanced? I know they can't hear, but maybe blind in one eye or something? I don't know. I'm not a vet, nor have any sort of knowledge on snake illnesses other than what is commonly discussed. Just thinking out loud? I hope he calms down for you. Poor thing. Again, from a layman's perspective (I am super new to snakes), it seems like he may be in some sort of distress. But I hope I'm wrong and he's just a "cranky old man".Good luck with your baby.