Board Thread:Dragon City Gameplay Questions & Answers/@comment-24968063-20140521131956/@comment-24568135-20140521133200

The breeding boost on the PC version simply doubles the chances of getting a rarer dragon. That said, some of the dragons have as little as a 1% chance of breeding. Doubling that only gets you to 2%.

As for the dragon's counter, I am assuming that you are referring to number of victories until the next upgrade? What does it show when you check the status?