Dragon magic

Jess and her blacksmith father have a dragon called Huff to fire the forge. They live in a mountain town, fenced to keep out the valley people. But it has no gate. The King charges Jess’s father with making a strong gate for the town. Huff is getting too old to provide enough fire, so they get a new, red dragon, who they call Puff. They work day and night to finish the gate for the King. Then Puff becomes ill, and it’s only with the help of a boy from the valley that Jess learns how to heal her and, excitingly, how to fly on her!