The dragon's arousal can wait for now. He needs food.
He searches around in the forest for a while but is unable to find much of anything. He finds a fox and grabs him before he can get away, but a fox isn't as filling as it was a couple days ago. He needs something more, something bigger.
The dragon keeps searching, his stomach grumbling with impatience. After searching a bit longer, the dragon decides that the forest might not be the best location to search. He heads out towards the river and finds just what he's looking for, a big, fat, juicy bear. The dragon observes him fishing in the stream. He's about the same size as the dragon and would make a great challenge. The dragon flexes, unsure if he's stronger than the bear.
The dragon approaches the river, and the bear growls. The dragon growls back, unafraid of him. The bear roars at him, telling him to stay away, but the dragon continues staring at the bear, thinking about the bulge in his stomach after eating him. The dragon takes a step towards the bear who takes a step back. With a leap and few flaps of his wings, the dragon lands across the river, only footsteps away from the bear.
The bear gets on its hind legs, trying to appear larger than the dragon, but still, the dragon is unafraid. Then, the bear attacks, swiping a claw at the dragon and then another. The dragon steps back before leaping at the bear, pinning him to the ground. Using its mass to its advantage, the bear pushes the dragon off with a roar. The dragon rolls over before getting back up and leaping again at the bear. The bear attempts to swing at the dragon, but the dragon digs its claws into the bear's arm. Before the bear can react, the dragon attacks the other arm.
Weakened, the bear tries to toss the dragon off again but cannot manage the strength. Opening his mouth wide, the dragon gets the bear's head inside. His stomach grumbles, eager to be filled. The dragon continues, sliding the helpless bear inside. His throat bulges a little around the bear's head, then largely as the thick shoulders start to go down. He struggles with the bear's fat stomach but manages to get it down his throat, bulging it out enormously. From there, the rest is easy. The dragon swallows his meal and lies on the riverbank with his full stomach. He belches and stares at the sky.
As his fullness draws him to sleep, the dragon catches a glimpse of another dragon flying high in the sky. He wonders where it is going as he falls asleep.
As usual, the sleeping dragon begins to grow. His arms and legs thicken and strengthen, as well as his claws. His wings grow larger, complementing his even bigger tail. His arms and legs lengthen, making the dragon taller as the rest of his body follows suit. He's much longer. His chest and stomach bulge out slightly, capable of holding much more inside of his ever expanding stomach. His throat grows as well as his head and mouth, to allow eating of even bigger creatures. Between his legs, his sheath grows bigger, sporting an even bigger penis. His pouch as well, grows.
Though, not all of his changes are merely physical. Other urges grow as well. His hunger, of course, is even stronger, but his arousal grows as well.
The dragon awakes to see his new size. Before, he was the size of a bear. Having more than doubled in size, the dragon is nearly an elephant's height. Though, he's longer. His hunger quickly returns, urging the dragon to get up. He catches a quick meal of a deer who made the mistake of visiting the river.
With a little food in his stomach, the dragon considers searching for that other dragon he saw fly by earlier.
