Zach,
Couple of things:
1) I think your on the right track w/temp/humidity! I don't think it's nutritional! I've done different types of Anteresia while feeding strictly rodents and never had a problem!
2) Since your babies were found dead in an "unpipped" egg, the lungs were never used to begin with!
3) Were the dead eggs on the top or bottom of clutch?
