David felt stunned by his face shoved into the vile straw covering the stables stall floor housing the man partially changed to becoming a draft horse. The half man half animal horse creature was not without concerns for his fellows as he did try to help David get upright and stand up on his own two feet. Alice was helpful too and when David stood up the creature and Alice took obvious note of how David was breathing fast and his eyes, closed, face coated with smeared manure, he acted as might a person entranced.
The creature horse fellow motioned for Alice to take charge of David her friend and he pointed her toward taking of David to an empty stall.
Alice knew the signs of a man infected by Transform Serum, she having met the creature and from caring for him knew the signs, and what to expect.
David did not know what all was happening when he awoke some hours later. He quickly discovered he was stripped naked and a wrist shackle and chain kept him from wandering outside the high walled box stall where he got placed. He noted too his skin color having darkened of hue, as his genitals were much darker, almost black their coloring. He began taking inventory of his physical self, finding his ears had points, and his beard having sprouted felt more like a smooth pelt on his face.
David rose to standing and felt his equilibrium as affected by his changed self. He needed to grab hold of the walls to retain an upright stance. He tried to yell for help only to hear some animals whinny in response to his cries.
He became more excited and from this he felt his penis becoming more aroused until it hung erect. David looked down at what was pointing upward at a fifty degree angle at his face, the normal circumcised end to it was then a blunt-flattened head with a much enlarged ring of extra-sensual flesh as if the corona, as he marveled at it attained new length of more than a foot long. It was then he thinking and comparing of what on him was as is that he noted his scrotum being four or five times bigger then he could recall.
His groans moans and sounds of stirring movement were noted by someone else and his stall door opened and in strode a sleek, pretty pony, it a mare, and she seeing him sporting his erection, she turned her rump toward David, raising her tail, she showed him her winking vulva. David stood there wide eyed and knowing what the winking vulva meant to the mare and what too, she was wanting from him to do.
As the door to his stall was again rolled closed, David did not wish to ask anything about his placement there in that stall, as he stood mesmerized by the mare and her offering.
David began hand petting of the mare from her withers to where he nervously touched the base to her hairy tail.
The mare feeling the advances done to her by David she snuffled and then softly whinnied her wish for him to help quell her sexual ambitions.
When David stood facing the rear of the mare, his erection by then was rock stiff and seemed elongated more than it was a while before. He discarded any concerns about morality, seeing what he was becoming more like the horse creature man, David thought as did the creature after he arrived there to the farm, as he too mated with a pony mare. David let his sensual aspirations control him and he with one hand aimed his blunt ended cock head toward the weeping wet vulva lips, to where when the tip of his cock touched her the lips opened and accepted his male member into the depths of her passionate self.
Wild was David with his new senses of desires, he moved in close to the mare rump, he feeling her body fur tickling at his bare belly.
David stood there with his male tool engulfed by the warmer mare body. He began slow movements like a stallion thrusting, he having stood and witnessed horses breeding there at the farm where Alice lived and worked.
Sensations sparked increased ideas of passion encouraging David to pleasure himself as would a stallion feeling the instinct to mate.
All the while from above the stall there, Alice stood watching, she jealous to some extent the obvious intense pleasures her sister Carla was feeling as David stood rutting his growing new cock inside the sensual confines of a mare not born as a mare. Whatever happened to change Carla into being such a sleek as cute a pony mare, she was not fighting her situation, but from what Alice saw, her sister relished being a mare!
Just about at the same moment when David climaxed spewing his load of semen into Carla, he lunged forward across her back, he having the lower spine and pelvic muscles cramping from changes occurring as he ejaculated.
Alice knew her sister as still the kindly caring individual she was when human, as then a pony mare of the Connemara breed. Her dear sister had replied to the local news paper advertisement, she having gone through the testing and changing, became a pony mare, and broke free from where they kept her, to return home and take her place as a brood mare there on the family owned and operated draft horse stud. Alice felt often jealous of Carla when she non-discriminating had sexual pleasuring done to her by a pony or horse stallion. Carla had dropped but one foal filly, as otherwise she seemed as barren, enjoying copulation with stallions and not becoming again pregnant.
Carla stood there for more than an hour as her newest stallion lover laid limply across her back, David unconscious, but his cock not limp in any respect!
Alice waited and watching, saw finally David begin to move, he rising to standing, began again his endeavor of mating the mare a second time. Unseen and not given any notation, but David while unconscious had begun sprouting his ultimate pelt of pony fur. He had a short sprouted six inches of tail bone and flourishing tail hairs, as his buttocks were conforming to look like those proper a pony stallion.
Finally after watching the lusty couple copulating, Alice walked away to do her duties, leaving the new found friends to work David into a sexual frenzy that in due time would doom, as damn him to live the lifestyle of a pony stud.
Carla stood there enjoying the caring attentions of a young man becoming, allowing his bodily self to transition from one species to a new embodiment. David was as a man inebriated by the heightened sensations and his newly enhanced male self, he lusting and wanting more sensations. As what was the afternoon when mating on through to evening, Carla and her mare stamina was eager to urge David on until his changing legs and feet had conformed to where his future was doomed.