I was sorry to see this, although he clearly led a long and surprisingly happy life. This is a nice story, in the sense that people cared about him enough to take great care of him, long after he was of any use to them. Would that it always happened like this!
I also LOVED Alydar, so, of course, I thought his son was pretty awesome, too.
http://www.bloodhorse.com/horse-racing/articles/218558/champion-turkoman-euthanized-at-age-34