Green, gooey stool means the flora in her stomach is off kilter. This is usually caused by a stressor of some kind-- a change in food, a new home, a hibernation attempt, etc. With mine, if they have green poops, I give them Benebac, which is readily available online or at Petco/Petsmart most of the time. It behaves as a probiotic to the healthy bacteria in their tummies, which puts things back in balance. However, if within a day the poops are not starting to improve, they visit the vet and get antibiotics. If there is any blood in the stool, we skip the Benebac and go straight to the antibiotics. I hope your little hedgie feels better soon!