The Irish stallion was euthanised after breaking down 350 metres from the finish line.
The comedian had previously revealed he'd turned to a "full plant based" diet for his health.
"Everything is a little bit different to how we probably envisaged it to be."
Racing Victoria confirmed the horse had been taken to an equine clinic after sustaining a pelvic injury.
Along with the 'nup to the cup' movement, many Australians are proving the race that stops the nation is not their cuppa tea.
Angry Protestors, gory fascinators and trending hashtags: Aussies don’t want a bar of the race that stops the nation in 2019.
Here's how to make them better.
Nation, you can start again.
Refugee advocates cause chaos at cup.
The horse was euthanised on Tuesday evening.