Tub Stallion: https://www.furaffinity.net/view/41670433/

It's a cold windy day on a milk farm far away from civilization, and on that farm lives a young girl named Angie. Spending most of her time in a large red barn, she currently sits on a small wooden stool beside a hefty cow - gently tugging on its udders to produce milk into a metal bucket. As it chews on a stalk of hay, she sighs lowly. "Hey buddy, would you care if there was a pony on this farm?" The cow looks at her with an expression of indifference. "Yeah, that's what thought... I just wish that-" Cut off mid-sentence, the large gate behind her opens, a white stallion trots into the barn.

Glaring at the horse in disbelief, she finishes her words. "… that I had a pony all to myself!" Angie shrieks. Jumping from the chair, she runs up to the newcomer and wraps her arms around his neck. "I'm gonna call you... Tub!" While rubbing his hoof into the soil, Toby licks her cheek with a wag of his tail. "I can't believe my wish came true! I don't know how this is possible, but I'm not going to question it." Without a second thought, Angie zooms outside and returns with a canister of black paint with a brush. After opening the lid, she dips the brush with a gentle swirl. "My Daddy only lets cows live here, so you're going to have to act like one, okay?" Telling him in an excited manner, Tub nods in response.

After a session of brushing random black splotches across his body, Angie curls and braids his tail into itself as thinly as possible before adding the last bit of paint onto the tip. "Almost finished, now follow me!" Guiding him to a high metal pull-up bar towards the back of the barn, she stands on a fiberglass ladder with rope and gestures the horse to rise up with her. Standing on his hind legs, he places both hooves and his head over the tall rail with a quizzical face. Swiftly tying the rope around each front hoof, Tub lets out a fearful nay as Angie plugs a rubber hose down his gullet, then knots the last of the rope tightly around his snout.

Trying desperately to escape, Tub pulls hard on the bar without even a wiggle from the firmly planted thick wooden pieces it's attached to. Angie takes down the ladder and dances her way along the tube her horse is connected to, leading to something covered beneath a large red blanket. Pulling it off dramatically, she reveals a giant cylinder-shaped milk drum with a blue valve on the front. "Since you're gonna be a cow from now on, you should have lots of milk inside you at all times!" Tub shakes his head in disapproval, still helplessly trying to escape. "I know, I know... You're excited to be my new pony, but first, you'll have to gain a little weight silly!" Misinterpreting Tub's terrified expression, Angie twists the valve - releasing the flow of milk.

As the delicious dairy product enters his maw, Angie leaves the barn to grab something stuff. "Bye Tub, I'll be back as soon as possible!" Refusing to ingest the drink, Tub's cheeks swell up like a pair of balloons. Nearly large enough to cover his eyes, the strain on his face becomes so unbearable that he swallows the pressured liquid in a single huge gulp. Thus, beginning a relatively noticeable bulge in his stomach as he accepts his fate. While his Adam's apple pulsates quickly up and down his throat, Tub's girth subtly bloats into a beach ball shape. His ears perk up as he hears the sounds of churns, gurgles, and sloshes coming noisily from within his expanding tummy. Spreading his hind legs apart, they begin trembling from the massive weight gain.

Tub's navel pops out intensively as stretch marks slowly line across his over-tanking midsection. Swollen to the size of a firmly plopped wrecking ball, his gargantuan midsection fits tightly between the supports holding him up. In a loud crack, his load shatters the wood surrounding him into a splintery shrapnel mess from the built-up pressure. Luckily, the machine spews out a lazy puff of air as it runs out of milk. While Tub's belly keeps him held up, the pipe remains tied to his limbs atop his aching girth. Rubbing his rear hooves into the dirt, he tries desperately to move, but can't due to the incredible weight of his mass. “I'm baaack!” Angie shouts while re-entering the barn. Running up to him, as if nothing's changed, she holds up a tiny paintbrush with a smudge of pink paint.

“And now for the final touch...” Tickling the brush against his protruding navel, Angie smirks at her masterpiece. “Yay...! I made your belly button look like an udder, aren't I clever?” “Yes, but not quite clever enough...” says Bill, Angie's middle-aged father as he stands behind her. “Daddy! please don't take him away from me, I promise I'll take good care of him!” She begs. “Dear, I wanted to surprise you, but since you've fattened him up the way ya did... I figure we should enter him in a heavy-weight contest at the county fair.” “Really?! One sec!” Re-propping the ladder up against Toby's enormous belly, Angie climbs up and unties the tube from his maw before kissing his cheek. “What do ya say sloshy? Ready to go win prizes with your rockin' new bod?” Tub just sighs in response, unbearably groggy. THE END