Cook, who is a farrier by trade, was hospitalised with a heart infection.
“My bicep was detached from my elbow and I had to have an operation,” Cook said.
“I then got sick and they found I had an infection which went to my heart.”
Cook’s hospitalisation forced him to delay Leadership Spill’s return and a chance to target the winter carnival riches.
“He’s got a few feet problems and being a farrier, I wanted to shoe him myself, so I had to wait until I got out of hospital,” Cook said.
Cook, who has been training for more than 20 years, is confident Leadership Spill can return to his best form despite his Mackay statistics.