Last year's Grand National hero Auroras Encore has been retired after fracturing a leg.
The 12-year-old was a shock 66-1 winner of the Aintree feature for trainer Sue Smith last April but had failed to hit the mark in three subsequent starts.
He finished ninth in the Sky Bet Chase at Doncaster last Saturday and it later transpired he had suffered an injury in the course of the race.
The problem required surgery and after undergoing an operation on Tuesday, Auroras Encore will not race again.
"These things happen. I just want him home to have a happy retirement," Smith told the Yorkshire Post.
"He has had an operation to a repair a fracture. They got him up successfully after the surgery and he was staying overnight in the operating box. Fingers crossed - it's still early days.
"He won a National for us. It doesn't get bigger than that. He doesn't owe us anything. This is a racing injury and I'm afraid that it is what you have to expect from the job on occasion.
"We have to expect these things and that's all there is to it. I just want him back to his retirement."