My son's 3 yr old female leopard geko has stopped feeding. She exhibits no outward signs of distress. Her diet has been primarily mealworms, which I queried the breeder about as to whether the shells could cause a blockage over time. I was informed no. I have my doubts as to the chitin in the shells, but feces are evident in the cage. The substrate is newspaper. The temps are within proper gradients. Any suggestions?