Can a horse that has been given too much Bute for laminitis go into Cardiac Arrest and result in death? The reason for this is because my friend had a horse that had Laminitis and recieved four treatments for the founder. My friend said that horses with founder were only given three treatments of Bute. Shadow(her horse) recieved four, and the day after his fourth treatment, he died of a heart-attack. Shadow was a 13yr-old black Morgan mix. And he was perfectly healthy in all his aspects. He was not overweight and did not have anything wrong with him until he foundered. I really need help on this. Oh. and does anyone know roughly what the cost of an autopsy for a horse would cost? I would really like to know.