Board Thread:General Discussion/@comment-24305084-20140109125216/@comment-10090661-20140113003008

@Arthur: They're not random, Arthur. The game is keeping track of the total number of Breeding hours. You get a cup when you have bred x hours (depending on your level.)

@All: Just breed the Dragons with the most hours you can, as fast as you can. As I said before, mine is around 80-120h per Cup at Level 78. Yours may be more or less. Good luck!