>>714032531
Depends on severity of the injury. Some horses fuck themselves up enough that they can't race again but can still live, and they have the popularity necessary to become a Sire. (Agnes Tachyon, for instance, which is the only reason we have Daiwa Scarlet.) If they seem like they won't be able to live without being in pain? Glue'd. Though that being said, they don't need to break anything to end up in that position. Lots of race horses who stayed healthy but never achieved anything had dire ends too.