(M to F Saint Bernard, F to M Tibetan Mastiff, F to M Bernese Mountain Dog)

“Hey, watch it!”

Kate blinked, taking a shy step back as Callie rounded on the stranger. Like Kate, the stranger was a brunette—but their similarities ended there. The woman happened to be taller even than Sean, but more than that, there was an aura of cruelty to her.

“Well? You gonna say something?” Callie rubbed her shoulder, a little dramatically. She was always one to stir the pot. That was half of the reason she’d dyed her hair a shade of pink that guaranteed she’d have awkward conversations with her Daddy Dearest.

“Hm, rather fierce for a girl,” the woman muttered to herself, as though Callie hadn’t just been trying to chew her out. “Love the hair. And a touch temperamental, unlike this one...” Her eyes wandered to Kate, staring at her like a cat would a mouse.

“The hell are you talking about!?” Callie fumed.

“Hey, there’s worse things in the world, right?” Sean tried to butt in, ever the diplomat.

At that, a curious look came into the strange woman’s eyes. “Hm. The man of the group, but not quite that in their eyes. The pink one doesn’t seem to think of you like that, and the tame one… Ah. You wish she would, don’t you?”

Sean clammed up, a hurt look on his face. Kate didn’t know why, it wasn’t like she didn’t like him or anything. He was an awesome friend. And honestly, he knew what to say when things got weird like… Whatever this was.

Unfortunately, with him hushing up, that meant it was up to Kate to try to defuse the situation. “Um, I’m Kate, this is Callie, and this is Sean.”

“Oh, I know that, Kate. But thank you for having manners, I can tell you and I are going to get along famously.” The woman smiled, hopefully unaware at to just how much Kate doubted that. “You can call me Georgia, if you like-”

“We don’t ca-rrrugh!” Callie coughed and clutched at her throat as Georgia flicked a finger in her direction. “HrrUFF! Ah… ahhhRRUUFF!”

Kate rushed to her bestie’s side, rubbing the girl’s back for all the good it did. Callie’s coughing fit continued, each cough sounding rougher and coarser. She dropped onto her hands and knees, head bobbing in time with her ragged breathing.

Kate didn’t want to believe it, but the stranger had to have done something to her, right? She looked up, but her plea for mercy died on her lips at the sight of Georgia scratching underneath Sean’s chin. He looked confused for a brief moment, but as the scratching continued, his gaze took on…

She didn’t know how to describe it. His eyes weren’t focused on anything in particular, and were slightly glazed over. It was close to some of the times Kate had seen him drunk, but usually whenever that happened he’d get strangely cuddly with her.

Georgia snickered. “Honestly, dense girls like you are my favorites. It always takes you so long to catch on.”

At the word ‘catch,’ Sean perked up, his head darting form side to side as though he was looking for something. His mouth fell open, and a thin trail of drool dripped down his chin as he started to pant like an animal. Or… Like a dog?

Kate blinked, a small and relieved smile on her face. “Oh! That’s a relief, I thought something weird was happening. Is this some kind of hypnosis show? Wait, that doesn’t mean I need to pay you, do I?”

“Hypnosis?” Georgia laughed. “Look at your friend, do you really think hypnosis would do that?”

Kate blinked and looked at Sean again, who’d forgotten how to walk. He wobbled on his legs, hands tucked under his chin for a moment. Then his butt wiggled a little too much, and he toppled onto his side.

“Not him,” sighed Georgia.

“HggghROOF!” Callie coughed once more, then whimpered in a very un-Callie fashion.

An apprehensive chill trailed down Kate’s spine. She looked down to find a dog in her friend’s clothes. Or something close to it. Callie’s face had stretched out into a short proto-muzzle, and a tail freely wagged above her jean-shorts. Worse than any of that was the fur, incredibly dense pink hair that puffed up her clothes like they were stuffed with cotton.

Kate jerked her hand away in panic, only to have it slap back against Callie’s back as though it was magnetized. Callie’s pink hair bobbed slightly with the force of it, and Kate whimpered guiltily. Kate looked back to Georgia, finding the woman’s finger pointing at the two of them.

“You know, I think I’d rather you do it to her. Like this.” Georgia cupped Sean’s face with both of her hands, palms squeezing his cheeks. She started to rub them back and forth, and Kate watched the cute boy’s face start to stretch like putty. Soon his cheeks lightly smacked against his face like a pair of droopy jowls.

Callie watched it happen too. Unlike Sean, she apparently still had her wits about her. She looked up to Kate with panicked eyes, but the best her changed vocal cords could manage was a whined “Nnuuhh.” Despite this, her paws shifted slightly, turning her face towards Kate’s own.

Kate couldn’t stop herself from mirroring Georgia’s motion. She started to rub at Callie’s cheeks first, feeling the soft fuzz that had grown all over her friend’s body. It was pleasurably soft and felt nice against Kate’s hands, which somehow made it worse. If it was a nightmare, everything would be awful.

“Nnnuh! CaawwlHUH! Nauurrgh!” Callie whimpered through thickening lips, her muzzle growing its own set of heavy jowls. They weren’t the only thing to grow. Her body was swelling too, puffing up within the confines of clothes that were meant to be worn by someone several sizes smaller.

The look in her eyes changed. Callie whined, straining against her tight clothes. Small flickers of relief made their way into her expression each time one of their seams popped.

“You can’t tell me that you kept the poor thing dressed! Oh, that sweet Tibetan’s got to be so pent-up, trapped in those tight clothes.” Georgia laughed, motioning to the dog beside her.

Kate’s heart clenched. She’d been so busy seeing Callie lose her humanity that she barely noticed Sean turn into a St. Bernard. Now here he was, slobbering onto his old clothes, wagging a tail that showed off his heat-laden… Wait.

Kate blinked twice, once to clear her eyes and another in a silent prayer that somehow she’d been mistaken. But there was no changing the fact that Sean was as far from being male as he was from being human.

“Oh, this? Don’t worry about Sugar. Instead, you should worry much more about how distressed poor Boxer here is.”

“Their names are Sean and Callie.”

“Hmm… No. I think I like Sugar and Boxer much more. And just for correcting me, I think you’re going to need to do something special if you want Boxer to burst out of those pesky clothes.”

Kate whimpered, looking back to Boxer and rubbing her face even more. Wait… Not to Boxer, her friend’s name was… Kate chewed on her lip, mind drawing a blank. Worse, all her cheek rubs did was slap Boxer’s jowls against her face.

Kate felt something bump against her backside, and she turned to find Sugar’s wet nose buried against her soft ass. “W-wha?”

“Don’t look at me like that,” Georgia tutted. “She’s just saying ‘hi.’ Which is good, because you’re going to rider her like a pony.”

Kate’s body did as told. She didn’t even need to think about it. Robotically, she rose to her feet, spread her legs, and then dropped across Sugar’s broad, furry back. It was warmer than she expected, and so fluffy that it tickled Kate’s pussy.

Kate squeaked, looking down and finding she was naked. She wanted to cover herself, but her hands instead rose before her, half-cupped. The reason why was soon clear: Boxer thumped her heavy paws into Kate’s hands.

“Lick them.”

Kate didn’t understand. But she obeyed. Her tongue slipped from her mouth, and she leaned forward, pressing it flat against one of the swollen pads that covered her friend’s changed palms. It tasted a little salty, like sweat.

Boxer whined in relief as her growth resumed. It started with her back, bulging wide and splitting her shirt down the middle. Her freed fur was able to grow to its full potential, a veritable mane of pink hair rushing around Boxer’s neck.

Sugar whined between Kate’s legs and moved a little closer to Boxer, which had the benefit of smushing Boxer’s drool-stained paws against Kate’s face. Kate could feel her tongue squish, pancaking out. When she tried to drag her face away, her tongue stretched like taffy caught in a machine.

“That’s better. Keep going. Louder.”

“Hgglum. Mllugghh.” Kate tried to moan as she gave her changed friend a tongue bath. Her longer tongue made loud, wet slurps that echoed with each shameful lick. Or… No, there was a literal echo, one in time with the motion of the dog between Kate’s legs.

“Hhhuh… Hrrruuuh…” Boxer panted, a terrifyingly familiar distant look in her eyes. They kept focusing and unfocusing, and each time it took a little longer for Boxer to make eye contact with Kate. “Kkhhhuuhh… Hhurrrrf.”

It might have been one last, desperate attempt to pronounce her friend’s name. It might have been a mindless noise. Kate would never know, and didn’t even have time to think about it.

“Go ahead. You can look.” Said Georgia with a smile.

Kate pulled away from Boxer’s paws, each of which was now as big as her head. As she started to dip her head down, she realized that no, she didn’t really want to look. She didn’t want to find out what was making that noise. But her head continued the motion, until she was face first with a nightmare.

Sugar was eagerly slurping at a growing red shaft between Boxer’s legs. It had a flared tip which dripped thick white droplets onto Sugar’s nose. The St. Bernard snorted, spattering the droplets back on Boxer’s swaying balls.

“You can’t tell me you didn’t think that Boxer was an odd name for a girl dog, right?” Georgia had a light tone to her words, like she was teasing an old friend.

“W-whhghhuhhy?” Kate slurred around her swollen tongue. It was too heavy and drooly, she couldn’t fit it back into her mouth even if she was allowed to use her hands.

“Why? Well, that might be a little hard for you… And impossible for them.” Georgia laughed. “There’s not really any rhyme or reason to it. It’s not like I was bored, or angry, or stressed. You might think of it as… habit?”

“Huugh… Hauwwbbuth?” Kate’s insides were squirming.

“You know. It’s like how some people stop to donate money to those in need, or others smile as a random act of kindness. I see people and…” She trailed off, gesturing to Kate’s crotch.

A new feeling coursed through the girl’s body. Her eyes went wide, she bucked her hips forwards a little, grinding them against Sugar’s soft fur. A moan spilled past her lips, and it was so loud that it was even more embarrassing than the thick drool that trailed down her chin. Though perhaps not as embarrassing as the knowledge that Sugar’s fur was now matted hot and wet with Kate’s arousal.

Kate fell forward, tongue flopping back and forth like a pendulum tied to the pounding of her heart. Her nose bumped into Boxer’s, and before she could pull her head back the Tibetan Mastiff locked lips with her, sucking her tongue into his mouth.

Tears dewed at Kate’s eyes, at how thick his breath was, at its raw flavor… At how it made her heart race even more. Her hips started to roll against Sugar’s back, and she imagined the wet slurps from between Boxer’s legs were instead between her own.

How would it feel to have that tongue caress her eyes, play along the nib of her clit? Would Sugar yelp at the sight of her clit bulging, swelling, throbbing as it grew bigger, began to drip with—

Kate whined, tears dewing at her eyes. No, she didn’t want to think of herself like that. She didn’t want to be a dog at all, and more than that she didn’t want to be a male.

“What’s the matter, boy?” Georgia whispered into Kate’s ears. Her fingers played against them, stretching them a little wider. “I can already tell you’re going to be a good boy. The shy girls always make for the sweetest pups. And…”

Georgia grabbed one of Kate’s hands. Kate couldn’t pull her lips away from Boxer’s, who now seemed intent on plunging his tongue into the back of her throat. Because of this, she could only see the change to her hands in her peripheral vision.

Georgia was being slow about it, tauntingly so. The woman rubbed both her thumbs against Kate’s pal, using the pressure to swell her hand further. She teased Kate’s fingers one at a time, letting the pressure of her fingers linger just long enough so Kate could feel every second of her digits shortening.

And the swelling… It was just as bad as the swelling between her legs, because it was just as pleasurable. Kate’s eyes rolled in her head, her cute voice letting out small moans muffled by her best friend’s canine tongue. Her delicate hands were swelling up, growing wider and heavier until it was like she was holding weights.

“I knew it,” Georgia sounded smug. “You’re going to be a big boy too. Just look at those paws!”

Kate whined again, unable to keep herself from humping Sugar’s back. She had a dick now. She had a dick now. It kept repeating in her head, with each pump of her hips. Her shrinking pussy squirted for one last time, giving her extra lubricant to keep getting off on her friend.

“Ironically, it’s not too far from what Sugar would have wanted. Did you know she had a crush on you? Poor thing was as pent up as you are right now.” Georgia laughed, reaching behind Kate and giving the girl’s tailbone a good squeeze. Then she started to turn it, cranking it like a winch.

Kate bulged with each turn of her new tail. It started with her tongue, which grew so quickly in Boxer’s mouth that he let out a surprised yelp. Kate swallowed his hot bark with her new growing lungs. She shuddered as her shoulders spread apart, as her hips widened.

Worse of all, she was being dragged away from the damp spot she’d made on Sugar’s back. Humping her dry fur wasn’t enough, and Kate whined like the animal he was meant to be, sure that it couldn’t get worse.

Then his body grew so much that his cock brushed against her tail, then against nothing at all. His hips pumped at the air, and he could feel his swelling balls start to sway between his legs. His… Balls? No, that was right. He was a male, wasn’t he? But Kate was… A human name? Why did it feel like ‘human’ wasn’t the word he was looking for?

Kate whimpered, afraid. There were too many senses for him to process, and-

“You’ll be a Bernese Mountain Dog. I’ve made up my mind,” Georgia announced.

Heavy fur burst from Kate’s every pore and he howled into Boxer’s slobbery maw. He couldn’t stop kissing the other dog but it felt nice—no, he should be ashamed of that, right? His thoughts swam, then treaded, then began to drown.

Kate could feel it, in passing moments.

One second, she’d look into Boxer’s empty eyes and catch a glimpse of her own Bernese reflection. She’d see her snout in her peripheral vision. She could feel that alien sensation of her dick and balls, flopping each time she pumped her canine hips. She tasted her own meaty, male breath.

The next second, he’d slurp at the Mastiff’s tongue. He’d try and hump the squirming bitch between his legs, the big oafish dumb mutt that he wanted to full with his pups. He gasped and snarled and wagged his tail because he felt so good but was so close to feeling even better.

“Knot her, Murph.”

Murph? Kate quailed inside the shrinking confines of a fading mind. She… He… He was confused. Kate didn’t like being confused. But he was worried too, about… Mating? Kurph… Kath… Mate? Mate. What was he thinking about?

The bitch beneath him choked slightly as the Mastiff’s cock finally swelled to a knot in her throat.

Bitch. Knot. Murph wagged his tail. He knew what he was supposed to do. He pumped his hips forward, drool spilling from between where his mouth met the Mastiff’s, spilling onto the St. Bernard’s back. He felt the bitch’s pussy swallow his cock, her hot tight walls squeezing his shaft and his tip, and each spasm was perfect.

Georgia clapped her hands.

For a moment, they were all each other again. Kate could tell from the new unpleasant squirm between his legs that Sean realized she was spit-roasted between his friends. Kate could see the guilty look in Callie’s eyes as he couldn’t keep his Mastiff body from stuffing Sean’s muzzle. Worse of all, she could feel how relaxed her own expression was, how pleasured she was to keep fucking the dog that had been a boy with a crush on her.

“Oh, this is my favorite part,” purred Georgia, “the part where you make a choice. Knot the bitch, and you all stay as stupid dogs. You pull out of the bitch right now, and I’ll change them back to normal.”

Kate’s ears perked slightly. She didn’t quite stop her hips from pumping, but she at least slowed them, desperately trying to think about anything other than how good Sean’s St. Bernard body felt.

“But Murph, you’ll stay a dumb male dog forever. And they’ll remember. They’ll remember who you used to be, and know what you are. Callie will know she made out with you when she was a dog; then when you were a dog. And poor Sean will know the closest he’ll ever get to you was when you were a big stupid himbo pup, fucking his bitch pussy raw.”

It was humiliating. Kate tried to say something, anything. He finally broke the kiss with Callie and let out a “hhrrowf” that was supposed to be an apology. It was an apology for what he did, not what he was about to do. Because even though it meant that he’d be a dog forever, at least his friends would still be human.

It took more will than he’d ever mustered in his entire life, but Kate backed away from Sean’s canine pussy, pulling his impressive length from her pussy’s embrace.

Georgia clapped again.

Kate’s hips pistoned forward. He howled in horrified despair, hearing a loud whimper from Sean beneath him, seeing the betrayal in Callie’s eyes that lingered until the last of her thought vanished and Callie became Boxer once again. A hungry howl muffled by Boxer’s knot marked the return of Sugar.

“Wow, that’s impressive! You totally would have, too! I swear, you quiet types never cease to impress.”

It couldn’t end like this, Kate didn’t have time to tell them that he didn’t do that, he didn’t move his hips, it was all Georgia that engulfed him in Sugar’s dripping bitch pussy that was so hot it was milking out all of his thoughts but he didn’t mind because… He didn’t know, just wanted to hump more, fuck bitch harder.

“But even as a human, you can’t have been too bright. You didn’t really expect I’d let you walk away and tell people about me, right?” Georgia crooned, savoring the three’s change.

She might as well have been talking to a wall, though. Murph was too busy licking away at the tasty wet spot on his bitch’s back. The Mastiff licked too, and at some point their tongue’s touched and Murph had to taste more.

He pumped his hips, knot swelling, sucking the other dog’s tongue into his mouth, gulping down drool mixed with the taste of human arousal. His eyes rolled back into his head, and his body convulsed as the first orgasm of his new life overtook him. The other dogs started to shake too, but none of them stopped.

Had they been able to understand Georgia, they’d have heard her laugh about how they were going to keep going until they’d came nearly two dozen times each, once for each year of their old human lives. But they weren’t people, not anymore. They were mindless, horny beasts who only knew of the pleasure of each others’ bodies.