Thank you so much! I've only heard the hiss a couple times, on 2 different occasions, there weren't multiple hisses in a row. I have not noticed any liquid around her mouth, but I will continue to watch her like a hawk. On monday I'm going to call my favourite vet who treats my cats to make sure they also provide care for reptiles, I would assume they do but I want to be sure.
I may schedule a vet check-up for her in the next couple weeks just for peace of mind. Is that a bad idea? Would it cause more stress than it's worth?
I thought two mice per week seemed a little weak also... Tonight is time for a feeding, should I offer her a third mouse? Is it okay to feed that many in one day?