Dragon Rider: The Griffin's Feather

The last winged horses are on the brink of extinction. Three foals
lie curled in their eggs in a sanctuary for threatened creatures,
where a young dragon rider lives with his silver dragon. The foals
are ill, and the pair volunteer to seek the only cure: a Griffin's
feather. But Griffins, with the heads of eagles and the bodies
of lions, are a dragon's fiercest enemy, and live far across
the world in the sweltering jungle. A dangerous and exciting adventure
begins ...