As the crew finalized the positions of the cameras they also managed to bribe the crew to bring a stallion in the next room which was separated from the current one by a large glass frame.
They secured Mark down using a wooden contraption which had his hands and legs pointing downwards.
After completing the setup they gave him a tablet like monitor that showed the transition of a young male to a young filly, in a lot of detail prompting him to get aroused and to hump the leather coated contraption just enough to keep him on the edge while looking at his dick retracting into the abdomen of the filly.
Is this change satisfactory?
Yes, replied Mark while simultaneously shivering from lust and fear.
As he was injected with the drug he jolted as it coarse through his veins like something very cold.
The assistant asked politely: What would you like to change first?
Can you do my arms and legs?
Yes, said the assistant as unfased and polite as the first time.
In the corse of 15 minutes Mark's hands and legs lengthened considerably with his index and pinky fingers shrinking back into his hands while the remaining 2 fused with his bone structure essentially leaving one bone for all of his now 4 legs.
The fingernails on earth one of his hands cracked and became much more black while extending out to engulf the terminations of his legs in a soft like nail until reaching the desired shape. After the saps of his hooves were achieved they hardened and became very strong very fast, able to sustain the mass of a horse no problem and more as he would find out shortly. His all 4 hooved legs cracked and repositioned their shoulder blades to his sides so quadrupedal motion became possible.
As he was pinned down with his face down on the specialized table and saw his 4 hooved legs he tried to feel his fingers through them, to spread them out, however to his surprise the nerve paths that achieved that still worked however the signal was not interpreted, it was a misfire, allowing him to only fold his hooves backward a small amount making him incredibly horny while saying.
I have hooves,.. I... I have the hooves of a horse!
Can you do my torso and tail next please.
The transformation agent didn't say anything this time and just followed the command as his torso began to bulk up with muscle and ligaments. Hs got slightly dissy as his organs began rearranging in him and his ribcage started to expand to acvomaodte his new dimensions.
He wasn't large for a horse and by the looks of things the horse he was turning into was in a good shape.
As his tail started elongating he felt just like when he sat down in his bead after running all day with his spine expanding to its original size, although this time it was expanding out past its original length and growing a beautiful coat of blach hair.
The agent asked him what coat would he like as a horse and he answered plain chessnut.
As soon as he said that a light and coarse coat of fur spread across his legs and torse engulfing his entire body even prompting his neck to lengthen to accommodate his new mane.
As the agent clicked and fumbled the options he displayed what was previously on the tablet like monitor to the whole room to see on a much larger monitor that showed what she was seeing.
It was a horse with a human head and a small cock in comparison to his body which appeared to be errect. Unbeknownst to them he was the hardest he had ever been.
Now, the next corse of action would be to turn you anatomically into a female horse.
Are you sure you don't want to reconsider and turn into a stallion 🐴? You would be doing the breading instead of receiving it...
As she said that he thought about his fantasy screaming at him about turning into a female and other people and stallions treating you as such! Never caring that you were at some point, just what they see, a filly!
No please, make me a filly, I need to be one!
The agent looked at him apologetically while taking out a serine that would empty him as a male in order for the cha ge to proceed.
As she injected it into his backleg he didn't feel anything at all for a good few seconds. However at some point his cock became incredibly errect as ond of the staff pointed it downwards against the chair so it could be visible both for collecting into the bucket under the chair and the camera.
After it. Ecame as hard as he had ever been in his life due to the stimulant an intense heat started forming in his abdomen and loins descending down to his cock slowly as it reached it, it became intoxicating with pleasure as without moving a muscle his orgasm began.
Each pump gushed out more sperm at once then he had ever done naturally evidenced by the splotching sound from the steel bucked underneath him.
It just went on and on until his cock was trying to pump and not ceesing his orgasm until only a small stream of pre cum and sperm were leaving his cock.
As the scientists noticed this they started his change as his cock once again started to throb at the knowledge of his final change starting.
As it retreated upward into his not all of his cum had been pulled out of him as it triggered his second orgasm prompting
Him him to scream as his shaft and testicle were pulled up inside of him and nestled in between the folds that he was now sporting.
He was panting intensely as he realized that he was now a fully like he had wanted.
He also asked them to give his face some horse features like ears and a muzzle and the nose however he desired to keep his ability to speak with other humans, something which was not possible for normal horses.
As he was finished the camera crew pointed the camera to where he was looking realizing that the filly was looking at the stallion behind the glass, and he was staring back.