Three horses died during the 2019 Cheltenham Festival after featuring in races across the week.
Ballyward was the first horse of the 2019 race week to be put down after falling in the National Hunt Chase.
The seven-year-old gelding was the favourite in the longest race of the day, a four-mile trip around the Prestbury course. Ballyward was one of 14 non-finishers in the race, out of 18 starters.
A spokesman from Cheltenham Racecourse said at the time: “Sadly Ballyward sustained an injury in the National Hunt Chase.
“They were immediately attended to by our vet team, who very sadly determined that it was necessary to euthanise them on welfare grounds.
“As animal lovers, we hate to lose any horse and of course we shall review this incident.
“Our thoughts are with the Ballyward’s connections.”
Sir Erec died on Gold Cup day. He had been favourite to win the opening race of Gold Cup Day, the Triumph Hurdle.
The race had been delayed when he lost his shoe before the start. Sir Erec went on to suffer a bad leg break while jumping.
Jockey AP McCoy said at the time: “I’m absolutely heartbroken about Sir Erec.
“There’s no other way of describing it. That is the toughest thing about the sport.”
After Ballyward was put down earlier in the week, Irish trainer Willie Mullins lost a second hour in the Gold Cup race.
Invitation Only fell during the festival’s blue riband race. He was treated by vets on the course but also had to be euthanized.