Dexter was still unable to form a single word, his upper lip was slowly tugging upwards and combined together with his nose. Under it, a hard bone like structure slowly formed from his merging teeths. A beak had formed to replace his mouth!
"Hat is hahhening?" Dexter said ineptly, unable to form certain letters anymore.
"You sound like an angry parrot trying to talk like that" Said Pickit, eyes getting watery from laughing.
Patches of brown and white fur began to spreading over his body, his nails elongated into claws, and his skin on his hands began to toughen. Dexter's clothes couldn't hold the fur back anymore. With a slow ‘Riiippp’ the combination of down and hair was released; Soft and shiny...
More strange sensations began to beset the new bird... New appendages started forming out of Dexter’s back, new bones materialising where there weren’t any before with muscles growing in slowly around them. While this was happening, his tailbone began to lengthen and form a tail on his backside, providing better balance for his new digitigrade stance.
"I told you! You shouldn't eat so many at once, but hey, now you will see how those seeds taste as a bird!" Said the Gryphon while he ate more of those seeds.
Dexter knew he couldn't argue without sounding like an angry bird so he just gave in and waited for the transformation to continue.
Without any time to waste the fur began to grew faster and faster; taking over his body...

Story and human character ©  DexterTheDerg

Pickit (Da birb o.o) by ©  Pickit
He also corrected the story for me :3