Bought a trio of dwarf angels from LFS (potters, flame, eibli). All eating at the store. Progressively, over the last three weeks all three sequentially stopped eating, became lethargic and died. No observable external symptoms. Treated with a broad spectrum antibiotic without success. Any thoughts on what might have happened? I'd suspect collection problems (i.e. cyanide), but ostensibly two of them came from Hawaii and Vanatu where collection is generally done properly. I am mystified.