Good catch on the droopy jaw for MBD. A single horn worm or dozen crickets in a week is a very small amount of food for a growing pacman. One of mine that came from a big pet store had the same issue but got better with proper nutrition. Lots of calcium dusting, being albino it probably won’t need any extra uv which can help them bind calcium. Try a pinky mouse or even a small mouse to really increase the frogs intake, dietary source is always better than supplements, but they are also fattening so don’t use them as a food source other than every few months. Was given liquid calglucon by the vet at one point to supplement for a while, but I’m not recalling if it was for the same frog or another that they thought was low on bone density.