You can use hissers but I wouldn't offer the adults because they are large and contain a lot of chitin. Not really a substitute for mice because they're not the same. It's always good to offer variety when it comes to food.
She really only needs to eat two or three times per week.
Water and honey is not supposed to be used for regular bowel movements. Only when they are constipated. Just use warm water if you think she needs to poop.