As soon as Dr Jenkins entered the room he was struck by the overpowering stench of animal sex. Standing before him were three horses, one large white stallion and two dapple grey mares. The stallion and one of the mares were in the middle of the act as they rutted passionately in front of him.
Jenkins backed up as he recognised the stallion: it was Prince, his former boss!
The doctor quickly moved to the back of the room, but was startled by a familiar voice almost whispering in his ear. “Well what do we have here? I guess you finally decided who you would like to take for a ride!” Jenkins instantly recognised that the voice belonged to the attendant that he had been speaking to mere minutes ago. However, the doctor didn’t have any time to react before he felt an intense pain in his neck.
Jenkins was startled and ended up tripping when the woman gave him a firm shove, sending him flying back into the room. The doctor soon knew what was happening as a familiar pain shot through his body: she had injected him with another transformation serum!
Jenkins tried to speak, but the pain was too great. Instead he lay writhing on the floor in agony as the formula began restructuring his DNA. Already, he could feel his bones and innards beginning to adjust themselves for his future form.
“There, there,” the woman said in mock pity as she knelt down beside him, “the pain won’t last forever. Soon you will accept your new status as a simple animal. You will be nothing but livestock: basic property of the Zoo.”
Jenkins shifted uncomfortably as he felt his body beginning to bulk up and his hands and feet slowly morphing into solid keratin lumps.
“I suppose I had better introduce myself properly,” the attendant continued, “I am Harriett King, although you will come to know me as your mistress. Soon you will belong to me, just another beast under my power.”
Jenkins bristled at this, he had to try to convince her that he was innocent. “P-please… it nnghh… it wasn’t me!.... Accident!”
“Oh please, you seized your opportunity to take over the Stables, whether you were the direct cause of this mess or not. And as for poor Mr Carter, I believe he, er… she, is currently being milked for the first time thanks to your handiwork.”
“That’s not neighhh. N- not NEIGHHHHH!” Jenkins’ voice devolved into whinnies as his body shifted even more. His chest had dramatically barrelled-out, while the bones in his appendages had adjusted to become four sturdy legs. He also sported a half-grown tail that swished in agitation as the painful process continued.
Meanwhile, Mrs King continued to whisper into the doctor’s ear, knowing full well that he could still hear and understand her. “Now look over there, that is your future, doctor.” Jenkins strained his head up, only to see Prince roughly pounding the mare beneath him. Both horses seemed to be lost in the throws of passion as the stallion stuffed his dick into his mate again and again.
“These two girls initially resisted their fates, but they soon changed their minds after they met Prince.” Jenkins turned his gaze towards the second mare as she watched the other two horses in what looked like jealousy. The mare clearly showed that she was in heat as her vagina winked open and closed rhythmically. However, this behaviour was slightly odd considering that she had clearly already been bred. In fact she had apparently been with Prince multiple times already, given the amount of cum splattered in and around her pussy and on the surrounding floor.
Upon seeing Jenkins’ confusion, Mrs King called out to the horses. “Don’t worry Marcia, Georgina will be finished soon and then Prince will be all yours again!”
Dr Jenkins paused. ‘Georgina and Marcia?’ Those names sounded familiar... No wait, it was Georgina and Mark...”
Mrs King smiled as she sensed that the doctor had finally figured out who the two mares were. “Yes doctor, I’m afraid the Police are otherwise indisposed at the moment. The poor dears resisted at first, but I think you can tell that they both now love their sexy new mare bodies. Ever since we let Prince in with them they have become completely enamoured by him. Your serum must have given them more stamina or something because they’ve been fucking practically all day!”
Jenkins felt sick as Mrs King held his head up, forcing him to watch the vivid display in front of him. As it happened, he didn’t have to wait too much longer for the couple to reach their climax.
Both horses whinnied out in ecstasy as they came together. A few spurts of pussy juice sprayed out around the base of Prince’s enormous cock as Georgina released her prize. Her mate returned the favour not long after as his dick flared and his balls churned, after which he began pumping sperm-rich stallion cum deep inside her eager cunt.
With his urges fulfilled Prince hopped off his mate and landed back on all fours with a thud; leaving his mate leaking cum as it oozed out of her overflowing vagina and ran down her hind legs.
However, as Mrs King hinted, Prince wasn’t satisfied for long. He turned to Mark, or ‘Marcia’ as she was now known, and quickly became excited again. Seeing the horny mare begging for attention soon made his dick go rock-hard again. Marcia now stood with her tail raised and legs spread; neighing seductively and wafting her powerful pheromones towards him. Her vagina visibly quivered in excitement as it winked open and closed; begging to be filled.
As predicted, the stallion could hardly resist such an open invitation. Soon he had his dick fully enveloped inside Marcia’s eager mare cunt as he drilled her needy hole in rough passionate strokes.
As the nearby sounds of equine passion got louder and louder, Jenkins started to feel odd as he sensed a faint heat starting to bubble up inside him. Watching the horses fucking wildly in front of him was having an unusual effect on his mind. Slight feelings of lust started to encroach upon his thoughts as he was forced to watch Marcia’s tight folds being spread tightly around Prince’s girthy cock as it slammed into her.
Upon noticing Jenkins’ obvious discomfort, Mrs King decided to further coax out these emotions. “Just look at her doctor. Look at the pleasure she is experiencing. You will get to experience this for yourself, but only once you give in fully. Give in to Prince and you shall never regret it.”
Jenkins felt increasingly hot and bothered as he continued to watch Prince ploughing Marcia vigorously. By this stage, Jenkins was looking almost fully equine below the head. He now sported a long mane and tail, both of which consisted of flowing chestnut brown hairs that matched the rest of his body’s colouration. Now the only changes left on his lower body concerned his genitalia…
Jenkins shuddered as he felt two sudden jolts of intense pressure on his lower abdomen. He winced as two black nubs of rubbery skin pushed out on his underside. It was soon obvious that these were a pair of nipples that were connected to two empty teats. This development made Jenkins feel sick as he knew what was coming next.
NO! He had to fight it! Jenkins shook his head and tried to focus, not willing to give in as the woman wanted.
Dr Jenkins managed this for a few moments, causing the process to temporarily halt. But then Mrs King grabbed his head again and made him look at Prince and Marcia again as they seemed to be close to finishing.
Jenkins tried to ignore it by shutting his eyes, but he soon found that his other senses were completely overwhelmed. The strong musky scent of stallion mixed with the sounds of Prince’s balls slapping against Marcia’s ass and the squelching of fluids inside her tight snatch all became too much. Jenkins felt his eyes slowly flitter back open as he had to get a look. Soon his vision was intensely focussed between Marcia’s legs as he started to imagine what it would feel like to be in her place. The doctor couldn’t help the stirring in his cock and balls that followed, now that he had allowed the transformation to continue...
Jenkins kept staring at Marcia’s pussy as the serum started to affect his own genitals. He suddenly came unceremoniously and without pleasure as his balls drained themselves of every drop of human semen he was carrying. Then his cock and shrivelled balls withdrew between his legs. Mrs King smiled as she lifted the doctor’s tail and moved behind him, eager to see the next stage of the process up-close.
Jenkins grimaced slightly as his scrotum began to change. The loose skin stretched and shifted to form a distinct mound beneath his tail. This skin soon developed into a dark fleshy lump, which proceeded to split down the middle as a vertical slit took shape, surrounded by a set of firm pussy lips.
Jenkins then felt odd inside as a new channel opened up that connected his developing vagina with his new womb. Then, the doctor’s new genitals finally finished developing as his limp penis slipped inside the warm opening. This quickly morphed into an equine clitoris which sat snugly near the bottom of his new teardrop-shaped sex.
Mrs King laughed upon seeing this, and the doctor’s total lack of reaction. Instead he was still fully focussed on Prince and Marcia as they continued to mate passionately. The attendant was slightly taken aback by the doctor’s behaviour. Just how potent was this transformation serum!?
She soon had an answer when she spotted an unmistakable smearing of moisture on the outer lips of the doctor’s new sex organ as his arousal seemed to manifest itself physically. Soon Jenkins took it to the next level as his new pussy started winking. His dark lips parted with wet squelching noises, revealing the bright pink flesh inside his channel as he flashed what was once his penis to the world.
“Quite the horny little mare aren’t we doctor?” Mrs King teased as she returned to Jenkins’ side. “Don’t worry, soon Prince will put his dick inside you, and then you’ll be locked in this beautiful body forever. How does that sound?”
Mrs King smiled as Jenkins whinnied in approval.
“Very well,” she continued, “you shall have your stallion once he is through with Marcia. Now be a good girl and finish off your changes. Become an obedient broodmare for your mistress!”
Jenkins, still in a lustful trance, followed his mistresses’ commands as he willed the changes to finish. Wait, why was he referring to himself as ‘he?’ He had a mare’s body, with a nice set of udders and a big beautiful cunt! He was a mare now. SHE was a mare now! She was a broodmare and she belonged to her mistress!
Mrs King smiled as she saw Jenkins’ changes accelerate towards their conclusion. Soon the doctor’s face had stretched out into a long equine muzzle, adorned with pointy ears and elegant chestnut hairs. Before long the changes had all finished: Jenkins was now a horny broodmare!
“Amazing,” Mrs King said in a satisfied tone, “I can tell that you’re going to be one of my favourite pets… and one of Prince’s too!”
Right on cue, Prince and Marcia reached their long-awaited climax as they came in unison. Soon a fresh torrent of sticky cum was flowing out of the mare’s gaping pussy and adding to the puddle that had spread across the floor. With his urges fulfilled for the time-being, Prince dismounted Marcia’s ass and tried to catch his breath.
However, the lucky stallion wasn’t to have much of a rest. Sensing her opportunity, Jenkins did everything in her power to entice the sexy male. She turned away from him before raising her tail and revealing her hot winking pussy.
Soon Prince was completely hooked. He drew in deep breaths as the scent of the horny mare in season filled the room. Seeing this unclaimed female with her legs spread and her pussy begging to be filled was too good an opportunity to ignore.
Mrs King smiled as she watched her freshly-minted broodmare fully succumbing to her instincts. She saw Prince’s dick quickly stiffen again as he approached the needy mare. Soon she would have one more simple, pregnant mare living as a permanent resident at the Stables…