Board Thread:Questions and Answers/@comment-6289495-20130305095004/@comment-9134334-20130305122143

Well, from the research I've done in the past, I've come to a pretty clear conclusion: It's almost always more efficient to try for only one dragon at a time. For instance, you might be trying to get a Forestfire and a Parakeet. Breeding the colors Red, Green, and Yellow might seem like a good idea, but the problem is that it introduces Red-Yellow fail dragons, which you wouldn't have to worry about when breeding the two color sets separately (Red-Green, then Green-Yellow).

Just my two cents. I could be possbly be wrong, but this is how I understand it. :)