They believe only the strong should survive.
Therefore, they did neither. They just let them try and recover on their own. They didn't do a mercy killing, but doctors were generally without honour in the Klingon Empire. Of course, being injured wouldn't get you off your duties. If you were strong enough, you'd keep going, For The Glory Of The Empire.
Kitface 11:04, June 14, 2011 (UTC)