I just posted something about this on the FFS forum, but I would also LOVE this feature in Dragon Story. I personally think this a feature that is practically a 'must' for these types of breeding game.

Many times I am trying for a specific element combo, but after my dragons are done breeding I sometimes forget exactly which ones I was trying for and I have to go look it up before scrolling through my numerous dragons to match up the correct combo again. A 'retry' option would make things go so much more smoothly, and it would even make speed-breeding (with gold) go A LOT faster and way more convenient.