After their first mating had ended and the wave of pleasure from the half hour long orgasm had subsided, Kirstin, Beasley, Marv, and Jimbob enjoyed the afterglow of their sex.
"That felt incredible." Said Beasley. She let out a big fart into the mud. It bubbled to the surface and filled the area with her scent.
"You smell incredible." Said Jimbob in what suddenly sounded like a southern accent. The come on seemed to work as Beasley leaned in and began to lick Jimbob's snout. A gesture Jimbob quickly reciprocated.
"How was it for you?" Asked Marv to Kirstin.
"Amazing. Although I got mud in holes I didn't even know I had." Grunted Kirstin with a smile.
"Want to take it even further?" Asked Marv with a wry smile.
"Oooh, let's!" Exclaimed Kirstin.
Marv rang a bell attached to the wall and suddenly the dog butler reappeared.
"We want to go feral." Said Marv.
"Feral? Oh that sounds fun!" Said Beasley, who was eavesdropping.
"Make it four, then." Said Jimbob.
"Very good sirs." Said the butler. Who disappeared for a moment before returning with another tray of the serums. The four pig people each grabbed a shot.
"Bottom's up!" Said Kirstin, with considerable more excitement than the first time she had consumed the concoction.
The tingling feeling from before returned, and the girls' bodies, and those of their boars, began to shift. But this transformation included far greater mental changes, not just instinctual ones, than the last one had. As their hoof hands reverted to just hooves, and limbs shorted, the transformation was taking hold.
"What...happening to...me?" Grunted a mentally diminished Beasley as her red hair fell off her head in clumps and she let out another fart into the mud.
"So stinky!" Grunted Jimbob as he nuzzled Beasley.
"Stin-key?" She struggled. "Stin-key good." The dumber sow concluded as she let the boar amble on top of her once more.
"Me...feel...OINKOINKSNORT! Funny." Said Kirstin, trying to hold onto her intellect with all of her effort. Her blonde hair fell off her head and onto the ground.
Marv cared little for conversation, all he wanted to do was mate with this prime specimen of pighood again: "You...so prit-tea! So fat!"
The mention of her weight delighted Kirstin who quickly gave up any attempt at holding onto her mind. This virile boar found her attractive and she needed to focus on that. She excitedly presented her fat rear to Marv and oinked in pleasure as he mounted her.
The four were now nothing but simple, feral pigs now, and they would remain that way until tomorrow morning.