A lone blue minivan with a stuffed trunk drove on a long stretch of two-lane highway in the middle of the desert, passing by some cacti, far off mesas, and the occasional billboard or two. Not much civilization in sight.
The vehicle's occupants were three anthro border collies and one dalmatian. The oldest one who was driving was Cam Collins, a border collie who has a mix of purple and brown splotches with the usual black and white fur. He wore a button-down red Hawaiian shirt with yellow palm tree print and jean shorts. In the passenger seat, was the second oldest Jesse with mostly white fur with black spots, wearing blue jersey and matching athletic shorts, he was sleeping with a neck pillow and a sports mag in his lap. In the back were the younger ones, Tyrone with white furred limbs and underbelly and ear and tail tip and black everywhere else, he was playing a handheld game device. He wore a green T-shirt and brown shorts. The final passenger was a dalmatian pup named Dustin similar in age to Roni with white fur and black spots and a tuft of spiky white hair on his head. He wore a plain white T-shirt with blue shorts and was playing a similar handheld game as well. He's Roni's school and neighborhood friend whose parents let him go on the trip.
Soon the minivan was approaching two desert mountains that the road was running through. But upon closer look it seemed to be blocked with a lot of construction vehicles in the way. Looks like they must take the long route around to Cam's dismay as the GPS rerouted. He had to turn left onto a dirt road, which was a bit bumpy despite being smoothed out. But once they were going wide around, the engine light on the dashboard came on with a ding sound. Cam uttered a curse underneath his breath as he had the mini in the shop before the trip with no problems.
"Something wrong, Cam?" Roni said as he heard the ding sound with a hint of concern, looking up from his game.
"I don't know. The engine light came on, going to find a place to stop and see what's the problem." he replied as Jesse was beginning to wake at the commotion going on.
While they continued the path, they eventually rolled up into an old wild west looking town as the minivan stopped on the edge of it, basically on the front porch while passing through a wooden gate. There were two rows of old wooden buildings that stretched nearly a few miles with a large gap that served as a road to pass on through. Despite how rickety they look they seemed well preserved with only much of the paint being chipped and faded away. Signs were posted on buildings to tell what they were such as the saloon, sheriff's office, general store and so on. 
Once the car stopped, Cam stepped out after popping the hood of the car up as smoke and steam seeped out. He had to step back when opening the hood fully as more steam and smoke blasted out. He fanned some of it away and investigated the car.
"What's wrong, Cam?" asked Jesse, looking out the passenger window.
"Looks like something overheated. Gonna have to call AAA to get a tow truck and probably going to be awhile."
Roni and Dustin looked at the ghost town with awe, like they were on a movie set for a western film. How can they resist the opportunity to have fun here?
"Hey, Cam? Can we do some exploring for a bit?" Roni asked from the back.
"Well, okay. Just do not go too far and be careful. When help comes, we're leaving right away."
"OK!" Roni replied as the two pups put their games away and unbuckled to get out of the van. 
The two then went deeper into town.
"So, Roni, where should we look first?" the dalmatian asked.
"Hmm...let’s see…" he was in deep thought for a moment as his eyes scanned the area. “Over there!”
He pointed over to the right to a large wide two-story wooden building with a faded red sign labeled ‘Saloon’ above a wooden canopied porch with a couple of broken splintered rocking chairs next to two swinging doors. There was also a tipped horse feeder near a wooden post. The building looked like seen better days yet surprising that it is still standing and could’ve looked worser for wear. 
The two pups walked up the two creaky steps and pushed through the doors as they swung open. Their eyes went wide with wonder as they were greeted with a wide area with wooden walls, floors, and ceiling that were caked with dust and cobwebs on every surface and corner. To the left was the bar station with a long-curved counter with a few wooden broken barstools strewn about. Behind the counter was a nearly empty three-tier shelf with only a few broken green and brown bottles on it.
In the saloon’s center were nine large round wooden tables evenly arranged and spaced to fill the area. They too were caked in dust with a couple toppled over. To the right was a semicircular stage with a brass pole in the center of it with lightbulbs on the edge of it. In the back of the room was a staircase leading to a second floor.
The two pups went over towards the bar side of the room which seemed the most interesting to them. They went behind the counter and were surprised to what they had found on the bottom shelf, a crate of corked bottles filled with bubbly liquid! They looked well preserved as if almost brand new and untouched by anyone or by time itself, just covered in a thin layer of dust. Roni pulled out the twelve-pack crate of bottles, six green bottles with caramel colored liquid while the other had pink colored liquid. On the box and bottles the label said ‘Sunrise Sarsaparilla’ with a logo of a rising sun over a horizon with a smiling face on it. Also labeled were the flavors, ‘Original’ for the green bottles and ‘Bubblegum’ for the pink ones.
“Sarsaparilla?” Dylan said, picking up a green bottle, wiping away some dust.
“It’s kind of like a root beer, I heard.” Roni replied, picking up a pink bottle. “Wanna try it?”
“Is it safe? This stuff is very old.” Dylan said.
“I’m sure it’s fine.” He assured him. “Here I’ll try it first. If it isn’t any good, you don’t have to, okay?”
“Okay.”
Roni struggled to uncork it at first, but soon managed with a loud pop as the cork flew out onto the center of the room. He took a whiff of a sweet bubblegum scent from the bottle. Then, he put it to his lips, taking a small sip. 
“Wow! This taste great!” Roni exclaimed as he took more sips from the bottle.
Seeing how his friend liked it, Dylan decided to try it as he uncorked the bottle. He took a swig of the stuff and had a similar reaction to the sweet root beer taste, really savoring the flavor. The two pups drank another bottle of the same flavored sarsaparilla and finished them after a few minutes, emitting a satisfying belch afterward.
“*Urp! Well, that was good.” Roni said patting his belly, then his eyes then went over the stairway in the back. “Let’s check upstairs!” 
“Ok!” 
The two pups went up the creaky steps and went down a hallway with rooms on each side. Nearly all doors were off their hinges, either rusted or rotted off. They could see the rooms were identical with a king size bed with canopy with a window above it, a nightstand with a kerosene lamp on top, and a round table with couple of chairs. Of course, much of it was in disarray, covered in dust and cobwebs and left to rot like the downstairs portion of the saloon. 
At the end of the hall, they came across a room that was more preserved than the others, basically less wrecked with things still in place. After exploring as much as they could which was much, yawns escaped their muzzles as they suddenly became sleepy and lethargic.
“*Yawn~…I’m getting tired.” Roni stated.
“Me…*yawn~…too.” Dylan said while rubbing his eyes.
“Wanna take a quick nap and look somewhere else?” Roni asked.
“That sounds good… *Yawn.” Dylan replied and agreed.
Roni lay on bed in the room they just explored while Dylan went into the room across to lie down. At least the beds were still comfortable enough and better preserved than most things with the canopies being worn, torn and nearly disintegrated.
As the pups finally fell into a deep sleep, their bodies underwent a great strange change with Roni’s being more complex.
His feet began to stretch and grow, gaining a few inches topped with petite toes. His legs lengthened and elongated, becoming slender with toned calves and thick thighs that made rips on his shorts at the hem. They also gave him about two feet in height as well.
He grunted as his pelvis region restructured. His hips flared out and widened while his waist thinned and shrunk, giving an hourglass figure. His butt bloated with some layers of fat while his tail elongated and became fluffier. His shorts and underwear completely burst and were destroyed in the process.
He moaned as he felt pressure in his crotch. His furred sac shrunk and receded into his body along with his dick, leaving a moist plump pussy in its place.
His torso stretched and widened as it aged, stretching the green shirt. Dark black nipples protruded stood erect through white fur. Then, they became puffier and wider, slightly bigger than quarters. Beneath them two mounds gradually grew into firm FF sized cups, making him moan in response. His shirt strained until it gave way and torn into pieces as two large, furred orbs burst forth.
His arms like his legs lengthened with slimmer tone and his hands became dainty with long fingers with equally long claw nails. Finally, his head changed as it aged and grew but with feminine features with longer narrower muzzle and long lashes. Long curly raven colored hair flowed from his scalp down his back until ending at the tail base. 
Gone was the male pup where now a fully naked adult female dog lay with tattered boy clothes.
Roni tossed and turned a bit in her sleep, feeling slightly off but still unaware of her new body. 
The sun dipped below the horizon as night seemed to settle in with the full moon high in its place. Strangely enough the streetlamps in town lit up like magic along with the kerosene lamps in each room of the saloon. 
Roni began to stir awake thanks to the glow of lamp in the room, groaning as she sat up. Her eyes flittered open and when her vision came to, she looked down to see two large milky furred orbs.
“Oh Dog!” she yelped in a deeper yet feminine unfamiliar voice as she clasped her throat.
Curious hands explored her new body, groping her tits resulted a moan. Same went when two fingers explored the flesh chasm where her cock used to be. She got up from the bed on wobbly knees due to her new height that she had to lean on the bedpost. She looked outside to see it was nighttime already. But not only that as the town was strangely lit up as the streetlamps seemed to be working for some reason. This was all too confusing and sudden, making her panic. 
“I need to get Dylan and find my brothers.” She muttered, still not used to her new voice as she headed to the room across from hers.
“Hey Dyl-!”
She paused at the doorway when she looked in shock at the occupant on the bed. It was an adult grey spotted dalmatian, fully nude with tattered kid clothes around him. His 6.4-foot muscular frame was like a runner or swimmer’s build, nothing too bulky but not lean either. His sheath held baseball sized testicles that were at the base of a ten-inch humanoid shaft. Roni couldn’t help but stare at it with mouth agape, panting, and her snatch moistening with pre. She shook her head to focus.
“Dylan, wake up!”
“Mmm… not now mom. Five more minutes…” Dylan mumbled with a deeper manly voice as he tossed and turned.
“DYLAN!” Roni raised her volume, causing the dalmatian to finally sit up awake with a jolt.
“I’m up! I’m-!” 
He looked down with widened eyes to see his new grown-up body and covered his crotch in reflex and modesty as he saw the naked female enter the room with muzzle blushing red.
“W-what happened to me?! And who are you?!” he said panicking. 
“Dylan, it’s me, Roni!” she said as she sat on the bed, trying to calm him down.
“Roni?! What happened to you? To us?”
“I-I don’t know…I think- *Gasp! The sarsaparilla!” she exclaimed with a face of realization. “That must’ve been how we changed!”
“What do we do to change back?” 
“I-I don’t know but it’s dark out and we should get back to my brothers.”
“O-okay!” 
The naked ex-pups hurried out of the room, down the stairs and out of the saloon into the dimly lit streets. However, another problem seemed to be brewing in the form of an approaching dense fog coming from each direction, threatening to engulf the town. They headed towards the car but paused when they saw it. 
Unfortunately, the car was engulfed in the fog with headlights on and doors open, but Roni’s brothers weren’t there!
“W-where are they?” Dylan stammered.
“I-I don’t know! Jess! Cam!” Roni shouted to see if they respond or appear, but nothing came of it.
“Now what?” Dylan asked, stepping back as the fog gradually rolled in closer. 
Looking around, Roni could see that they were going to be surrounded by the eerie wall of fog. There was no way of escaping it.
“Back to the saloon! We’ll just hold in there!” Roni replied as they made their way back to the saloon.
They arrived, going through the door and upstairs, and into the last room, closing the door behind them. They went onto the bed huddled together with bodies touching and inhaling their scents, feeling trapped as the fog slowly crept close. 
“Well, not sure if it’ll hold until morning but it’s all we can do for now.” Roni said solemnly. 
“Yeah…um Roni?” Dylan asked.
“What is it?”
“Do you…um want to…do it?” he asked nervously, blushing as his dick began to unsheathe.
“You mean… sex?” she said, letting out a slight gasp when she noticed his erection. The sight of his shaft made her immediately hot and bothered with pussy getting slightly moist.
“Since we don’t know what will happen to us and well, might be our last, do you… want to?” he asked again.
“Well, I guess… what do we have to lose?” she said as she lied down on the bed, spreading her legs to expose a wet pussy.
Dylan looked wide-eyed but also with a newfound sexual hunger as he began to crawl on top of her. He stopped by her breasts and gave them a nice lick each before tongue teasing them more, making Roni moan and shudder in response. He even fondled them too, eliciting more sexual reactions. Once face to face they gave each other a few affectionate licks before locking muzzles into one long kiss. Their genitals rubbed up against each other as Dylan’s shaft grinded against her moist slit, making her shiver again in pleasure.
“Ready for this, Roni?” the dalmatian said, breaking the kiss as his tip prodded her entryway.
“Yes, give it to me, Dylan! My body wants it so bad…” she pleaded, holding onto him tightly. 
“Okay, here goes!” he said as he thrust his cock into her, making her moan loudly in response as her body arched in reflex.  
“Oooo~h….Aaah! Dy-Dylan…haah..!” Roni panted as the Dalmatian pumped in and out of her at a steady pace.
She wrapped her legs around him and continued to lock muzzles with more passionate kisses. Dylan gradually pumped faster into her with the bed creaking and rocking from their movement. Both panted quicker and harder as sweat soaked their fur. His pulsating dick gradually got slick from her moist inner walls that throbbed while squeezing his shaft. The built-up pressure within them were peaking, nearing climaxes. 
“Aaaa~h! Ooooh! D-Dylan…haah…I think I’m…haah….gonna CUM!” Roni cried out with a gasp as her vagina let loose a stream of juices onto his cock, slickening it more.
“Ung…haah…Ooh! Me….Aah…TOO!” Dylan said aloud as his hose blasted a torrent of sperm into her womb, filling to the point of overflowing and dribbling as fluids fell onto the bed from her snatch.
He exited her with a wet plop as they embraced in the afterglow of sex, exhausted. After some nuzzling and more kisses, they fell asleep soon after. It wasn’t long until the fog overcame the town completely.
The next morning…

“*Groan….mmm….hm?”  
Roni slowly stirred awake as sunlight poured through the window, but something was off as her ears picked up sounds from the outside. A cacophony of footsteps, hoof clops along with horse whinnying, wooden wheels, and murmurs and chattering of people. How could there be this much noise in a ghost town?
Her eyes shot opened and let out a sharp gasp. The dilapidated room looked brand new with blue wallpaper and clean wooden floors with a smooth sheen without a speck of dust to be seen. The tables and chairs were unbroken and upright as well as the nightstand next to the bed. The bed that they’re on was restored with fresh white linen sheets, firm mattress, the purple lace canopy, and blue blanket beneath them. 
She heard a groan next to her to see Dylan, stirring awake. Once he was fully awoken, his eyes widen at the restored room and sat up quickly.
“R-Roni what happened?” he asked worryingly. 
“I-I don’t know! Maybe that fog from last night must’ve done something.” Roni replied unsure. 
She then hopped off the bed and looked out the window with Dylan right behind her. The pair’s eyes widened again as they saw the ghost town now restored and full of life with many anthro dogs walking and talking about, some riding horses and carriages. What was more surprising was how everyone was naked like a nudist colony with privates on full display with the only articles of clothing visible for some were, top hats, cowboy hats, bonnets, bowties, gun holsters, etc.
“We should… get out of here.” Roni stated.
“Yeah…” Dylan agreed.
The ex-pups left the room into the now rejuvenated hallway with blue wallpaper. They passed a naked Brittany along the way, wearing a feathered tiara followed by a husky which gave them a minor pause.
“You got a nice man there, girl.” The Brittany commented, making the two blush for a moment. 
Continuing their way down the hall, they went down the stairs and froze halfway when they saw the scene that displayed in the restored saloon. It was like a western flick with the bar manned by a rottweiler wearing an apron serving drinks to a row of cowboys and wiping glasses at the counter with a full shelf of liquor behind him. The scattered tables were now upright and full of nude anthro dogs playing poker, drinking, and smoking, and flirting with some of the barmaids. The stage was restored as well with a female Afghan dancing on the stripper pole. 
 They maneuvered around the saloon to go outside to be greeted by the western scene they saw from above as they dodged more dogs, horses, and carriages down the street. When passed down the road and pass the general store and some houses, among the crowd Roni thought he saw a pair of familiar male border collies, looking around confused. Her eyes widened as then she called out to them.
“Jesse? Cam?!” she cried out to them when she approached them with Dylan alongside her.
Her brothers reacted in confusion when they heard their name and turned around to see a naked female border collie and grey dalmatian that seemed oddly familiar for some reason.
“Wha-? How do you know my name? Who are you?” Cam asked dumbfounded with a blush.  
“Cam, it’s me! Roni!” she said aloud, shocking her brothers. “And this is Dylan.” She added, gesturing towards the naked grey dalmatian next to her who just slightly waved nervously in response.
“B-but what…How?!” Cam stammered.
“It’s…a long story. We’ll tell you at the saloon.” She stated.
They all went back to the saloon and into the room where Roni and Dylan slept as they explained the events that had transpired, omitting the sex from last night. 
“This…this is a lot to take in.” Cam said as he sat in the chair by the table with Jesse. “Is…is there any way to go back?”
“I don’t know… I think we’re stuck here.” Roni said sitting on the bed with Dylan beside her. 
A long uneasy silence filled the room until Roni spoke back up again.
“Also, um…me and uh… Dylan…had sex before the fog got to us last night.” Roni confessed.
“You guys what?!” Cam blurted out at this shocking revelation while the two ex-kids recoiled in slight fear.
“Well, we didn’t know what was going to happen when the fog rolled in! And…and our bodies felt weird and…had um…some urges that we couldn’t control. And…” She then placed a hand on her abdomen. “I…might be pregnant.” 
This other revelation continued to shock her family, including Dylan now beside her.
“Are- are you sure you’re pregnant?” the Dalmatian asked. 
“I…I think so? My belly feels a bit strange after last night.” She said with a small hint of uncertainty. 
“Well, either way, we’re stuck here and… we’ll have to live here until further notice.” Cam simply stated, earning understanding nods from everyone in the room. 

2 Years Later

In that same room of the saloon, there were some extra refurbishments along with the addition of a wooden crib and a cradle. On the bed, an eight-month pregnant Roni held her year old daughter Bonnie, a black and white female dalmatian, as she breastfed her with tits that grew a couple cups after pregnancies. 
Dylan and Roni were now an official couple as they made the saloon they woke up in their home. Well, Roni had to work there as barmaid to keep that room for them and to pay rent while Dylan helped at the general store in town. Cam became the deputy sheriff’s assistant while Jesse, now the youngest, still had to go to school.
“Hi, honey.” Dylan said as he entered the room. 
“Hey, sweetie, how’s your day?” Roni replied as he plopped down next to her.
“Same old, same old. So we’re going to that new restaurant that opened at the town’s edge this weekend?” Dylan asked.
“Yeah, my brothers will be there as well. First, Chinese restaurant ever opened in the area.” She replied.
They were interrupted by a tiny coo and yawn by their baby who stopped nursing on her teat. 
“Guess someone’s sleepy.” Roni whispered as she took her bundle of joy and tucked her in the cradle nearby.
The couple then lied on the bed together, embracing each other and leading into a passionate kiss before another hot night of sex.

The End