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Sighing, Aaron took a seat in the veterinarian's waiting room. He mouthed a silent prayer that it wouldn’t take long to examine Bella but knew he would most likely have a long wait ahead of him. It wasn’t that Aaron minded taking his dog to get care, it simply confused him how such a young Burnese Mountain Dog could be so unwell as to necessitate four checkups in the span of a week.He reflexively reached for his cellphone to pass the time only to be met with a ‘NO BATTERY’ message after attempting to power it on. Mentally kicking himself for not charging his phone earlier, Aaron knew that not much could be done without a power cord and began to defeatedly eye the room for a newspaper, tabloid, or anything that could repel the boredom that had already begun to set in.His gaze landed on a magazine rack in the corner of the room that held a white tablet propped against the wall, it’s screen facing away. Aaron took keen notice of a yellow restriction warning on the back of the device: a clear sign that whatever employee left it out wouldn’t have done so intentionally.Curiosity ultimately overwhelmed him as he snuck a quick glance down the adjacent hallway before darting over to the tablet, which, upon him getting a closer look at it, reminded Aaron way more of something from Black Mirror than it did something from the real world.The tablet displayed a window upon bootup with a heading above it reading: “New user detected! Please read the information below very carefully.”Aaron elected to only briefly scan some of it, as his goal was to be entertained, not waste time reading phrases like “experimental software” and “maladaptive stipulations”.He scrolled through the seemingly endless document and checked ‘agree’ at the bottom, excited to see what such a caution-warranting piece of technology could do. But to his immense disappointment, Aaron realized after multiple text fields opened up with labels such as “NAME” and “HABITS” that he was likely holding nothing more than a simple entry tool for his pet’s information.Instead of putting down the tablet, however, Aaron figured that, since there really was nothing better to do, he could at least use it as a chance to test himself on his knowledge of Bella to see how good a pet owner he was.He tapped the on-screen keyboard to input Bella’s name and species, filling in additional info once another box appeared for her specific breed. His hand and forearm jittered slightly as though they had received a jolt of electricity, that feeling spreading quickly to his brain and imperceptibly altering his brain chemistry.Aaron had trouble deciding what to enter for Bella’s personality. He ended up entering in three of the things he remembered the dog kennel mentioning to him when he adopted his new pup: hyperactivity, promiscuity, and, the one he found to be her defining trait, over-drooling.Movement from outside the window behind him made Aaron jerk his head in its direction. He felt an odd flutter in his gut upon seeing a jogger and her dog trot by. The jogger gave Aaron an odd look, which he understood the intent behind once he figured how it must have looked for him to have been staring at them. Feeling extremely sheepish, he returned to the tablet and absentmindedly used a sleeve to wipe some saliva from his lips.He turned over the words in his head, wondering why this would be a question any pet owner needed to answer. After some thought, Aaron reasoned that him entering the tidbit about Bella drooling had somehow tuned the next question to that specific habit, which made enough sense to ease his worry. Not knowing the precise measurement, he settled on 10 inches in length, having little perspective on exactly how big that was and wanting to move on.Quite out of nowhere, a glob of drool splattered onto the screen, causing Aaron to immediately reach for his mouth out of alarm. To his shock, his lips had a rubbery texture to them, and they had almost bloated to the point where he could see their new black coloration in his peripheral vision.Aaron began to panic more than slightly until being calmed by the realization that his lips were perfectly natural like that. In fact, he saw nothing strange with the fact that he’d let drop a huge load of slobber from his mouth - there was nothing wrong with doing so for him. He had enough sense to know something was amiss, though, and so resolved to keep filling in the registry while remaining apprehensive. Aaron put his attention back on the device in front of him, swishing his tongue around in his mouth after having suddenly found it uncomfortable.There wasn’t much special to Bella’s looks, so Aaron left it at her having mostly dark fur with regions of white and tan. While keying this in, he became aware of how weird his tongue felt in his mouth and decided the easiest solution would be to let it hang out freely. An indescribable wave of pleasure and relief washed across him from indulging the bestial urge and letting his tongue fall past his chin, carrying a wave of slobber with it onto the tablet.The length of his tongue would have instilled some unease in Aaron were the feeling of cool air on it not so refreshing. He sucked it back into his mouth with a satisfyingand was eager to return to the task at hand.He quickly saw that he wouldn’t be able to continue on account of how much drool was covering the screen. Aaron once again did what felt most natural and licked the tablet clean, his tongue extending to a more inhuman length while doing so. He was too caught up in the act to register his nose taking up a much larger presence in his vision, even normalizing the new muzzle and damp, black nose on his face after the fact.“Bella!”A yell from down the hall sent a shockwave to his ears, pulling them upwards and giving Aaron the ability to excitedly swivel them toward whoever had called for him. Only, his ears drooped once Aaron saw that the doctor actually called for Bella, who had just briefly run out of the operation room. He blinked. Why had he been excited to hear the name ‘Bella’ called out? Did he think it was his name? Was Bella his… name? Yeah! Bella was his name! He began to pant with satisfaction in finally letting go another nagging point of contention in his head - or, as Bella now saw it as,head. Bella, having happily rebranded her identity, once more set her attention back on the tablet, her mind feeling more and more scattered by the minute, and her body growing smaller and furrier at an even faster rate.Bella saw that she’d inadvertently scrolled back up the entry screen during her frezyful licking and that the two boxes for gender, male and female, had gone unticked. Her ears, now capable of doing so, perked up in momentary confusion. Who was she filling out the information for again? She knew she had to enter Bella’s gender, but wasn’t she Bella? Then surely she’d enter… male? Female?Memories flashed in her mind of life as a male, but they seemed so distant for some reason. It wasn’t as though others had rewritten them, Bella simply felt that they didn’t fit with everything else. Even the clothes she was wearing weirdly made no sense to her, and though Bella couldn’t place why at first, the many splotches of black, white, and tan fur sprouting across her skin reminded her that fur keeps her warm, not clothing!Bella quickly stripped naked, rising from her chair to do so. But something about the way she was standing felt wrong. Again, she immediately wondered why that was - Bella had so many memories of being a male, bipedal human, after all - but soon assumed a position on all fours once she’d decided to yet again do what felt most natural. Her knees buckled outward and seemed to shrink her legs in the process, bringing them to the same length as her arms, which now stood nearly perpendicular to the carpet. The multicolored fur had spread nearly everywhere on Bella’s body but her wrists as if allowing her to make the final selection.Without hesitation, Bella tapped on the ‘female’ box, and opted to finish entering information due to something within her pulling her away from, though she’d never described it as such before, thistechnology. The device hummed, eventually returning the message: “We’re sorry, some text fields were left empty. We will try to autofill them to the best of our abilities.”DogBellaHyperactivity, promiscuity, over-droolingBlack fur, white & tan regionsMaximum1/10OffBella felt the last of her humanity fade away as she struggled to make sense of the human device’s text. Her teeth grew longer and sharper as her entire digestive system shifted to that of the predator she was becoming. Her hands morphed into paws to allow for a more digitigrade stance, becoming structured like her hind paws. Bella’s stomach churned as her center of mass readjusted to her new quadropedic stance, which now gave her tremendous agility and, the part she thought was more appealing, a sexy figure that male dogs would hound after.And those facts soon complimented the rest of Bella, as her eyes glazed over with primitive stupidity, soon seeing her surroundings through one context: sex. Bella’s thoughts became more simplistic by the moment as she began to pant and whine, a puddle of drool forming by her paws as Bella’s body communicated to her that she was in heat.At last, Bella’s male genitalia changed into the proper, female equipment for satiation of her lust. Her tongue lolled out from the side of her mouth, occasionally flitting upwards to lick her wet nose, as Bella examined the room around her. She no longer had the intelligence to know what she was doing in the waiting room; it was as if Bella had been reborn, with her only purpose being to mate, reproduce, and repeat.Using her powerful haunches, Bella sprang from the floor and onto the chairs to stare outside. The jogger she’d seen earlier walking a dog had done their rounds, now heading back in the opposite way past the window. This time, however, even with a window between them, Bella could smell from its musk that the dog was a male, and the scent coming from his posterior elicited such a euphoric feeling from her groin that she only grew more crazed.Bella’s mind was too clouded for her to surmise any other plan than ramming through the glass storefront, surprising her soon-to-be lover and his owner. But something made her pause. It was almost as if Bella could feel her former self fighting to break through her canine veil. Even as a dumb dog, who wanted nothing more than to satisfy her lust for the male in front of her, she could feel that some part of her didn’t want this.Conflicted, Bella finally decided to do what had been effective up to this point: do what feels most natural, face her rear towards him, and give into her instincts. There was no trace of Aaron left, but neither was there much of the former human’s pet in what he’d become. Bella was simply Bella, a dumb, stray bitch who was the first satisfied user of PETFriendly services.