Kentucky Derby winner is put down

I was very sad to hear this news:

http://news.bbc.co.uk/sport2/hi/other_sports/horse_racing/6311373.stm

Barbaro, who broke his leg in a race shortly after a stunning victory at the Kentucky Derby last May, has been put down. The four-year-old colt shattered his right hind leg in the Preakness Stakes and underwent a series of operations. But he suffered more complications to the injury over the weekend which needed further surgery. "We reached a point where it would be difficult for him to go on without pain," said co-owner Roy Jackson. "It was the right decision, the right thing to do. We said all along if there was a situation where it would become more difficult for him then it would be time." He first caught the public imagination by winning the Kentucky Derby by nearly seven lengths - the biggest margin in 60 years.