I fed my Sky Frye up to a 12 right away for the battles in chapter 9. I have to admit, this is not a bad dragon in battle, there have been a lot worse, the color combination is useful. Today I took down a blossom 11 and immovable 8 in the tourney.
By day 9 I had all the quests completed and that's after missing a day earlier in the event. The lower food requirement was awesome. Waiting for my last music note to finish crafting and then the final day tomorrow.