Jenkins sat in the middle of the barn, trembling as he felt the fluid immediately began its work. His innards churned as he felt the nub of a tail tent the back of his pants. "You've got it all wrong! Check the prints! She did it to herself!"
Carter shook his head. "Yeah, whatever. Not my job, not my problem. What is my job, is turning a bad employee into a good milker or better meat."
Milker? Jenkins groaned, both at the realization that he was likely turning into a cow and because his clothes were starting to grow tight. Already, his hips and legs were pulsing with muscular growth, his pants straining to keep his body contained. "Please! At least notify someone to look it over?!"
"And put my neck on the line? No way."
Jenkin's shoes grew loose, as he kicked them off he realized they'd already progressed into the cloven hooves of a Holstein cow. He briefly wondered why this cow serum didn't strike the head sooner, then he started to feel the burning pressure of what he assumed to be horns. The buttons of his jacket began to pop open as his chest slowly barreled further out, creating space for his growing organs.
As his pants began to split, he frantically yanked his belt loose as he knew the health complications of lower midsection belts on transforming subjects. Then, he realized he still had one possible out:
His antidote. It was certainly not complete, but he'd been able to make the skeleton of a solution in his spare time. He'd considered it boring at the time, but he always kept a dose with himself in case any upstart employees or freak accidents occurred to him. He had been designing it with his equine discipline in mind, but the mental effects of the zoo serum were pretty consistent and he was turning into an ungulate. Perhaps it would be enough?
Jenkins swung his hand into a back pocket as his fingers began to blacken, retrieving the syringe. Carter noticed. "Wait, what do you-"
With his vast experience in transforming others, Jenkins found a vein and injected the antidote into himself. He turned to Carter and tried to muster a smile, but he wasn't sure what kind of face he was actually giving, between the burning feeling throughout his skull and the numbness of his facial muscles.
Carter had noticeably paled. "You god-damn idiot! Suicide by double-injection?! Ugh, the paperwork I'm going to have to fill out! Now I'll have to remember the guards' names so I can blame them for not searching you..." He returned to a most composed stance. "Alright, let's see what unsurvivable amalgam you turn into.
Jenkins doubled over, clutching at his stomach as his body shredded what remained of his clothes. The "antidote" felt like he'd poured gasoline onto a nearly-dead fire, causing new agony across the sections of his body that had already transformed. Worse yet, the cow serum was apparently still active as his genitals receded into a very recognizable slit between his legs. His, or more accurately her, still-blackening hands started to be forcefully pushed away as her stomach bloated outward, the flesh growing tender as it did so.
As the sausage-like teats began to grow in, Jenkins began to wonder if the antidote had actually done anything. That bland, black-and-white pattern had begun to crawl its way over her body as she watched her fingers slowly wither into a hoof-like shape. As if in response, the antidote created a new pressure across Jenkins' chest as it bulged outward, creating two fur-covered lumps. Furthermore, her front "hooves" could barely be called that: she still had a thumb and two fingers to each hand. They were far from dexterous, but it was something.
She hadn't gone into a mindless tizzy of lust yet, so the mental curative seemed to work. Her tongue felt foreign in her muzzle-like maw, but she had to try to put on a show for Carter. She heaved herself upright, using a nearby gate for balance. "Cooall. B-...Boooosss." The words weren't hard to think, but the mouth was so foreign. She liked to think there was some dignity in how she was acting, but she knew the bulbous udder dangling between her legs and mostly-cow body likely appeared ridiculous.