The necropsy was inconclusive. The closest they came was a hypothesis: "overwhelming allergic response to medications or environmental triggers to which the animal has become increasingly sensitive." I think it was EM herself who said they told her it was like a "shellfish allergy" reaction, which sort of goes along with that hypothesis. But the second opinion from the Riddle & Rood vet seems to cast doubt on that, if I'm reading it correctly. I don't think it's fair to say it's being pinned on the Legend injection or an underlying lung condition, and I don't see any evidence at all that it was magnesium (not saying it wasn't). I am still puzzled as to why no one tried to find the groom, who was there and may have been the one who actually gave the shot. It would have answered some questions, no?