**AN: Inspired by The Perfect Pet by fueledbyquarantine, definitely recommend checking out their work if you like this. Also, this is a non-con story, and I feel like it needn't be said but I do not condone the behaviours that these characters engage in. If non-con elements are likely to trigger/upset you, I'd advise you don't continue**
Prologue
Cai smiled down at his pet, currently napping on the floor by his masters' feet. His hips gyrated slowly and his cock ground into the carpet. Cai knew that couldn't be a comfortable way to get off, but puppies were not supposed to use their hands. Buddy had taken a while to get used to his new life, but for the past few months he had been nothing but a model pup. Cai had told him earlier today about the gift he would be bringing home for him soon -- a bitch of his very own that he could mount to his hearts content. He liked to think that is exactly what buddy was currently dreaming about, as he rubbed his cock raw and red in an attempt to cum (not that he could without express permission from Cai).
And now
Andrei awoke in the same holding cell that had contained him for the past few weeks, groggy and confused. It took him a few moments to gather the strength to open his eyes, trying to chase away the heady fog of sleep permeating through his mind. The first thing he did was check his hands, fervently hoping that his memory of the previous night with the doctor had been nothing more than a horrific nightmare. He looked down to see that they were tightly covered in some sort of soft black wrapping, and it was clear from only a glance that there was no way his fingers would have any room to fit inside. A garbled croaking sound escaped his mouth in place of a scream, and he winced slightly at the discomfort the noise brought to his throat.
Silent tears streamed down his cheeks as gathered the courage to look behind him and confirm what he already knew. He craned his neck hesitantly over his shoulder and sobbed at the sight of his new tail attached just above his asshole. Frowning a little in concentration, he explored the new muscle connections and sensations coming from the new appendage. From what he could tell the damned thing was fully functional, curled in towards him and shaking with the fear that was steadily overtaking over his mind.