"What if it's a diet thing? You remember the slime I was studying? From the Skaven?" You nod. "The animals that eat it seem to be in perfect health physically, but they become jittery and more prone to fighting, especially over food. What if the Dwarves have a similar problem with their diet?"
You frown at that. "Well, the Karak Vlag Dwarves - well, the one of them I saw, anyway - was much thinner than most Dwarves I've seen. And Karak Azul Dwarves tend to be leaner as well. If the diet they see as a sign of success is failing them in some way..." You shake your head. "No, that doesn't make sense. The Young Holds have the same diet, and they don't have the same malaise."
"Perhaps not exactly the same," Panoramia says thoughtfully, looking about herself, and then shifting in place until an arm makes its way out of the blankets to pick up a quill.