Part 1
Carson, a recently hired hand on the farm was out working on a fence when he was stuck by a bout of dizziness. It was probably hunger he thought. The only thing he'd had so far was that glass of milk from the barn fridge. He probably shouldn't have taken it, but he was thirsty and there was nothing else around.
Suddenly, the dizziness increased and Carson began to sweat. He sat down abruptly when a wave of weakness passed through his entire body. Shaking his head he looked down to see...a slim torso and scrawny hands, nothing like the muscular form built over years of hard work. He didn't know what was happening, but any hope of help was far away, across the property. Carter got back up and began to run.
Along the way he was nearly thrown to the ground again as two massive weights unexpectedly swelled on his chest, his tiny male nipples getting lost in the new expanse of skin. He...had breasts!? Just what was happening to him? Was it the milk? And why did he seem to be turning into a woman???
Part 2
A few steps further and his nipples followed suit, doubling in size, then again, and again. Their sensitivity ramped up at the same rate and it was all Carson could do to not stop and fondle the strange new growths. Before he could make any more progress, he was overcome by the urge to strip out of the clothes that no longer fit his changing body. Unable to resist, he was soon naked when he was struck by two sharp pains on the top of his head and another at the base of his spine. Reaching up, Carson could feel two horns growing out of his head! And turning around, he spotted a tail! As another wave of change swept through him, Carson was forced to his hands and knees. He didn't know what was more disconcerting, the feeling of his face elongating into a more animalistic shape, or the cracking and popping as his hips and ass expanded, growing heavy and round. It was probably when the familiar presence between his legs diminished and disappeared, an aching emptiness taking its place. After all that, the mane of blonde hair growing out in seconds was almost mundane.
Finally able to concentrate again he, now she, made it into the barn, only to find it empty. Carson stumbled, leaning against a wall as her feet went numb. From numb, they turned dark, hardening into a cow's split hooves. Carson leaned there panting, her face still changing, nose and chin continuing to extend away from her head even as her ears grew long and floppy, gaining a wide degree of movement. Spots crawled over her body and white fur grew. She lost another hand as it too grew numb and black, a third hoof moving her further from the human she had been. As Carson stumbled back outside on three unfamiliar appendages, the long blonde hair so recently grown began to fall away, leaving more white fur and cow spots in it's wake. Carson stopped yet again, overcome by a sudden warmth and pressure from her ever swelling breasts. The sensation brought on a feeling of giddiness and anticipation that she could not explain, but still, she waited. And, with a smile on her face, she watched as a single white drop formed on her swollen nipple and fell to the ground. Her focus was taken entirely and only one thought ran through her head. She needed to be milked.
Part 3
Please sir! I'm sorry I drank that milk. How was I supposed to know this would happen?
I'm sorry Carson, you haven't worked here long enough to be told, but that milk is how we make new cows. Which is something you've learned the hard way. Now come along, I can see that you're full.
They are full sir, but can't you do something to help me? Can't you change me back?
No Carson, I can't. We've never developed an anti-cowgirl serum. What kind of madman would do such a thing? No, Carson...hmm Cathy, Callie, Cassie! Yes, Cassie...you're gonna provide for the farm in a whole new way, but I promise, it'll be a pleasant one. Our cows are renowned for their extremely high production, and do you know what our secret is?
Please sir, they're starting to leak.
Oh, I'm sorry, let me hook you up and start the suction. There we go, one and two. Now how does that feel?
MMmmmmm. Soo goood. Mmister, is it supposed to fffeeel like this?
That's our secret, Cassie. Well, another of them. Our cows produce the most because our cows are the happiest.
Happyy....meeooooo??
Yup, and the happiest cows are the dumbest cows, which you should be feeling right about now. Am I right, girl?
Mmmooo? Mmmooo! MmmooMooo!!!
Shhh, shh don't you worry, just let the machine do it's job and you do yours. And what's your job Cassie-girl? Why, your job is to stand there and be a happy, dumb cow and produce lots of milk! Now, be still and I'll give you a good brushing.
mmmm Moo! mmmmmmm Moo moo!
Aww, you're an affectionate one, aren't you? I suppose since you're being such a good girl I'll reward you. You see, this machine has a 'back attachment' to help further stimulate your production, which I'll insert just so, and turn on the power...
MMMMOOOOOOOO!!!!MOOOOMOOO!!!
Such a good cow, Cassie-girl. You're gonna be real happy here.