Board Thread:Dragon City Breeding Questions/@comment-39.48.22.98-20130328111518/@comment-7730059-20130402163636/@comment-3271569-20130402171044

I suggest you have a look to the breeding page. The breeding boost increase both dragon level with 6 during the calculation. Because of this the rate increase between 20 and 150%. How higher the rate how more slots you will unlock. You will need 1000 rating in order to unlock all 30 slots.