for archangcl as a belated birthday gift - sorry it’s so late doll D: but here is dean turned into a kitty :3 (a little bit of a canon divergence - no MoC and Cas has wings again but they still live in the bunker)
Castiel appeared in a flutter of wings at Sam’s beck and call, hearing the younger Winchester’s distress. “Sam?”
Sam spun around, looking nervous for a moment, before sighing and simply stepping to the side. On the hotel bed, on top of one of Dean’s plaid shirts, rested a tan tabby cat with beautiful green eyes; not emerald or some other type of overly grass green. No, the cat’s eyes were like a grassy field in the late autumn day.
"Dean?" Castiel asked, his head tilting to the side. He could have sworn the cat sighed.
"Um, we sorta have a problem," Sam said with a nervous smile. "We ran into a witch… and… um… Well, Dean’s now a cat." Dean, the cat, sneezed. "I also think he’s allergic to himself."
Castiel sighed and walked up to the furry animal, slowly picking Dean up, despite Dean’s disgruntled meow. He held Dean up to his face and squinted his eyes. “Do I want to know?”
Dean looked away and drooped his body and ears. Sam came to stand beside them, holding up his hands in uncertainty. Eventually, Castiel tucked Dean in his arms and began to carry the cat out of the motel. Sam was hot on his heels, gathering up their belongings.
"Can you fix him?" Sam asked as he went to put their bags in the Impala. They’d been on the case for four days and Sam was definitely ready to go home.
"Maybe," Castiel said as he disappeared with Dean in his arms.