Board Thread:Breeding Questions/@comment-24500396-20140424150007/@comment-10760902-20140518052005

The level of your breeding sancturay matters. It defines the chance of getting the dragons and also unlock new set of breedable sanctuary dragons.

The percentage are listed below:
 * Level 0: no thing new, breeding will be just like before the update
 * Level 1: dragons in tier 1 of the breeding sancturay are breedable, and has 50% of overall outcome of the breeding results.
 * Level 2: dragons in tier 2 are unlocked, and the percentage of breeding will be 30%:60%:10% (possible dragons from normal breeding : possible dragons of tier 1 : possible dragons of tier 2)
 * Level 3: unlock tier 3, the percents are 20:50:20:10
 * Level 4: unlock tier 4, the percents are 20:30:30:10:10
 * Level 5: unlock tier 5, the percents are 20:30:20:15:10:5

For example, a level 2 sanctuary will have the odds
 * 30% of all possible dragon that are breedable in normal way
 * 60% of all possible tier 1 sanctuary dragons, if there is at least one in the possible outcome
 * 10% of all possible tier 2 sanctuary dragons, if there is at least one in the possible outcome

Suppose that there is no possible dragons available in one branch of the cases, the rest will be distributed evenly. (ex: if your breeding combo won't make any of dragons in the tier 2, the chance will be recalculated as 33:66 (10% of tier2 was obmited))

Joeseph Seeley has a really accurate breeding calculator in his dragoncityguide.net. Check it if you like.

P/S: sorry about my inactivity lately. I don't have much time unless it is summer.