Behavioral Modifications

Story by Panth Shadowclaw on SoFurry

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I have no idea why I wrote this, but I did. This is the story of a certain snep (I'm looking at you Kieran) and how he's going to be molded into the perfect, horny little sex slave he's always wanted to become. There's a picture to come, I'll update this with a link when it's done.

A shout out to Rhenthar (how do you link to someone's profile?). This whole cockamamie idea was their fault. Turns out both Kieran and I found their stuff to be way too hot and had to add our own little piece.


The scene was picturesque; a snow-covered mountainside filled the background, changing to a small open clearing before the forest began. The river was frozen-over, coated with the same fine dusting of snow that covered the pines and rocks. A single bird could be heard somewhere in the distance, trilling out to the cold morning. All else was still, save for a small mountain goat doing its best to forage a meal from a small evergreen. The moment was perfect.

But that's all it was, a moment. Suddenly, a figure burst from the rocks. White on white, it was impossible to tell what it was at first. As the second stretched, the goat turned towards the disturbance. The prey instincts kicked in, telling the beast to run. It turned, heading down the slope and into the woods. One step, two steps, three steps; the creature began to realize what exactly was behind it: a snow leopard. Before another second could pass, the feline leaped. Claws out, fangs bared, the feline was just moments from landing its kill.

Out of the nearby brush, a whiff could be heard. A red-feathered dart left the barrel of the hunter only fifty feet away. The dart sung true, landing perfectly in the flank of the pouncing leopard. Behind the white-cloth mask, the hunter smirked. He knew the leopard wouldn't know what happened until it was too late, probably thinking it had snagged a branch. He knew better though, he knew that the dart had already emptied its potent payload of tranquilizer into the unsuspecting feline. He watched as the feline fell upon it's prey.

The snow leopard barely noticed the sting in his flank, focused solely on the prey in front of it. As time continued onward, he could feel his paws make contact with the terrified goat. All he'd have to do is sink his claws in and dinner would be served! He tried to press his claws into the exposed back but found his body wouldn't obey. He tried to draw his paw back in a raking motion, again finding his body uncooperative. Instead of a perfect pounce, the leopard found himself crashing into the terrified beast. Unceremoniously, he found himself landing in a pile on the snow-covered earth. There he lay, the world slowly fading to black as the goat disappeared into the brush....

The feral feline woke up sometime later. Immediately he knew something was wrong, this was no natural sleep. The snow leopard's eyes shot open, only to squint closed again. Mounted in the ceiling were rows of evenly spaced lights. It took a minute for his eyes to adjust before he could see any more. Above him was a stark grey ceiling, probably made of concrete. He tried to raise his head but quickly found that impossible. Something was around his neck! Snarling, the feral thrashed, quickly realizing his entire body was tied up. The struggle continued for a few minutes, the snow leopard trying to find some way out of the restraints. It wasn't to be though; whatever was tied around him wasn't moving in the slightest.

From his struggles he could tell there was a collar wrapped around his neck, some sort of strap around his chest, and finally another strap around his hips. Furthermore there was something holding his paws into the air, a thick leather cuff fastened to each limb. While his front paws were simply held up and out of the way, the way his hindpaws were held up was quite.... revealing.

"Hello? Is anyone there!" meekly issued from his muzzle. While most would be surprised at the seemingly feral animal talking, the man behind the one-way mirror knew better. He knew this creature was perfectly sentient. The man, a doctor by his lab coat, chose this moment to leave the viewing area and meet with his patient.

"Ah! Good afternoon kitten. Kieran was it? I do hope you had a god nap." The doctor entered the room. As he stepped into the light, the snow leopard Kieran could see the predatory stare of the large anthropomorphic wolf. The man, as was easily determined by the canine sheath visible from the open lab coat, sauntered up to the strung-up feline.

"Um.... How do you know my name? Where am i?" Kieran looked up and down at the doctor, realizing that the lab coat was the only thing the dark-furred canine was wearing. He spied a nametag, Dr. Verizi.

The smile that spread the canine's lips was somewhere between kind and sinister, "You're name? That's easy my feline friend, we have been tracking you for quite some time. You are a valuable specimen after all. As for where you are, that is truly unimportant. You are where you should be," the doctor was looking over the feline, examining him from a few feet away before coming closer.

"Tracking me. But why?"

"Because, our client was looking for a pet. We've been paid quite handsomely to find him a sentient feral that he can call his own. And YOU most definitely fit that order. Or at least you will." Dr Verizi stepped out of view for a moment before bringing a cart. Kieran tried to see what was on it, but with his head and body tied down it was a futile effort. The doctor grabbed a measuring tape and began taking measurements of the feline. Legs, neck, tail; each was measured and written down onto a clipboard. He set down the board and reached a hand down to pet over the feral's belly. "A lovely coat you have, I'm sure your new owner will be quite thrilled."

He continued to stoke Kieran's belly, lulling the feline into a false sense of security. Between the petting and the bondage, he was even starting to enjoy this a bit. The tip of his feline member poked free from the furred sheath visible between his legs. The doctor chuckled, moving a hand lower to grope over the furry pouch and emerging length. "Good kitten, I had to take some measurements there as well...." He continued his stroking, a wolfish grin on his face as Kieran slowly erected. "So small! I'm going to have trouble measuring properly at this rate." A blush formed under the leopard's fur as the doctor measured the feline spire, chuckling and taking notes down on the clipboard.

With a clatter, the clipboard was set back onto the cart. "Measurements for some of your new.... Clothing." A hand went back down to your groin, continuing the earlier ministrations.

Kieran spoke up, "Can't you just let me go? I promise I won't tell a soul."

He gripped down, rubbing the feral's barbs in a way that had him seeing stars, "I'm afraid not, kitten. No, from here on you are property of your new master."

The feline shuddered, "And who is that?" His form began to shake, the tranquilizer finally wearing off and the situation finally becoming real along with the pleasant sensations coming from his shaft. If it wasn't for the various straps keeping him tied down to the table, he would be humping into the wolf's waiting paw.

"You'll find out soon enough. We've studied you enough to know your tastes. I think you'll find life as his personal sextoy to be quite pleasant."

The word resounded through the feline's skull, both making him throb and nearly wet himself, "But what if I don't.... mmmf!" The feline's question was cut short as a red ballgag was shoved into his muzzle, quickly silencing the squirming panther.

"That is certainly enough of that!" Doctor Verizi handed the clipboard to an assistant who walked in, a golden retriever. He took a metal tray from the other canine, "Get to work on the harness and cuffs right away. The client expects delivery in just under two weeks, and he'll need at least three days to get used to this," he said, motioning with the tray.

"Yes Sir!" The retriever scurried out of the room, off to some other part of the building.

With a metallic clang, the tray landed on the table. On top, the feline could now see a large pouch with a greyish fluid in it. After a few moments of looking at the pouch, he could just make out something black and snakelike coiled up in the plastic container. He didn't know what it was, but given the circumstances it couldn't have been anything good. Kieran looked back forward, despite all of this his shaft was still throbbing. A bead of pre dangled from the tip, dripping to mat the fur of his belly. He almost didn't notice the doctor gingerly pick up the pouch and place it on the feline's belly.

"First things first, we need to get you into the proper mindset. Your new master has requested a pet with an extremely robust sexual appetite, one who will always be willing to raise their tail at a moment's notice. Your new friend here will go a long way towards helping with that." With a glint of steel, a scalpel appeared in the doctor's hands and quickly sliced open the pouch. Cool grey fluid poured out of the bag, coating Kieran's fur and splashing to the floor below. The doctor stepped back quickly, making towards the exit. "I'll leave you two to get acquainted," A sadistic laugh could be heard as the door closed with a resounding click.

The bag deflated on his belly, revealing the long snakelike thing inside. A full minute passed, not a single movement or sound save for the thunderous roar of the feline's own heartbeat in his ears and the drop of whatever fluid had once been in the pouch. There was a certain dread in the air, the fear of the unknown. Then it moved.

It was slow at first, a twitch of the tail, a shudder through part of its length. Finally, as if slowly waking up, the head moved. It seemed to look around the room, despite having no apparent eyes. As it rose up, Kieran could see an almost metallic or latex sheen to the creature. For a moment, it looked straight at the feline before turning around. It almost seemed to taste the air, attracted to some unknown scent. It slowly uncoiled, probably a foot and a half in length. Its head edged closer to the feline's exposed length, still slowly dripping pre. The creature edged downward, an inch at a time before coming in contact with the matted fur of the feline's belly where copious amounts of snow leopard pre had been collecting.

As if someone had fired a gun, the creature suddenly shot forward, quickly wrapping itself around the restrained feline's length. It hugged the barbed shaft like it had found prey. Its head began to explore the surface of feline's cock, sliding towards the head. Its movements were frantic and excited before coming to a sudden halt. It had found the tip of the feline's cock, seeming to bask in the bead of pre adorning the tip. Its head nudged right up against the opening of the feline's member before suddenly pressing in.

Kieran's eyes went wide, partially out of shock, partially out of pain. The creature was too wide to fit inside the small urethra, but that didn't stop it. It forced its way forward with surprising strength, slowly burying its head into the feline's shaft. The leopard writhed, a sharp burning pain shooting down his cock. The creature pressed onwards despite the feline's pain, the first inch now buried into his shaft. The pain lessened as more of the creature wriggled its way down the tight passage, thinning out in the middle. He could feel it squirm down his cock, working ever deeper to places he had never felt stimulation before. Despite the pain and the fear, he was harder than he'd ever been in his life. As the creature passed the halfway point, something changed.

The back portion of the creature seemed to open like a morel mushroom. As it slithered further down his length, the creature's covering was pushed over the outside of the feline's member. The black sheath closed over the barbed length, covering it completely before pushing into the feline's sheath. It pushed deep, pressing down against the root of his member before seeming to pull itself tight. It compressed the member, forcing out any remaining air before the creature surged forward one final time. Kieran gasped as it pressed right into his bladder, pressing past the muscles at the entrance to rest inside the organ. It shifted once, twice, before finally falling still.

The pain died down, finally letting the feral take stock of the situation. Looking down, he gasped. While before, his cock had been the throbbing, pink, barbed spire he had always known, now it was smooth and black. The entire member was coated in a shiny black coating, going right down into his urethra; and from what he could feel all the way to his bladder. He writhed, trying to bring his paws down to caress his abused member but it was no use; the bonds held strong. "What's going on?!" The confusion and fear were almost tangible in his voice. His bladder would have long ago loosed its contents had it not been for the creature now residing inside him.

"What's going on you ask?" The doctor had re-entered the room. This time, pink could be seen between the lab coat. The wolf's half-hard cock was already dripping pre, filling the room with his musk. "What's going on is that we've made some modifications. I don't want to ruin the surprises though." The feral felt a brief jab at his flank as a needle was inserted and its contents emptied into him. "Don't worry, we're not that cruel. We'll give you some time to get used to your new....pet." Kieran's eyes started to droop lower, sleep quickly claiming him.

Kieran slowly came to sometime later. He shook his head trying to clear the sleep quickly, meeting with only partial success. He propped himself up, still laying half on his side trying to figure out what was going on. It was a prison cell, obviously designed more for an anthro than a feral. The floor and walls were concrete with a small window high up near the ceiling. The door was a crisscross of metal bars, much too small to allow him freedom. Beneath him there was a bed, probably designed for some sort of large dog. A quick sniff.... Yep, it was definitely a doggy bed. He sneezed to get the scent out of his nose and noticed the strange object in the corner, some sort of small bowl-like thing.

He was about to get to his feet, when the situation dawned on him. Like a bolt of lightning, his muzzle went to his groin. From the outside, everything looked fine. His sheath was closed, no blood.... But he felt sore and achy. A quick sniff also told him measures... there was something in there. He reached out with his tongue, pushing the furry pouch down with his muzzle. His flaccid length sat there in the light, black and shiny. Tentatively, he reached out and lapped over the length. The response was immediate. Somewhere deep inside something shifted. It wasn't painful. No, it was strange and foreign but also almost... pleasant. It shifted again on its own once more but then went silent. His tongue explored the tight feline sheath, reaching down to the base of his cock. There was no seam, nothing to pull at and no immediate means to pull the thing off. While unwanted, he was slowly getting himself hard again; the explorations having the unwanted effect of pleasuring his shaft. Surprisingly, he could still feel everything right through whatever was covering his length except for one section under the head... the one section he'd normally..."

"Nfff!" He moaned out, his tongue lapping at the feline member. Again, something deep inside moved. Along with it came the strange pleasure only adding to his own. It was a tingle, almost electric in nature, centered right around his bladder. The same place that normally felt really good when he came.

"I wouldn't do that if I were you..." Kieran bolted upright at the voice. "You're only going to wake it up."

The pleasant squirming from deep inside didn't stop after he had removed his tongue. He had to concentrate hard to focus on the person outside his cell. "Wake it up? What's going on?" The creature inside him continued to squirm, firing nerves deep inside that had never been directly stimulated before. Now it felt like someone was suckling on this shaft, but from the inside. A soft moan escaped his muzzle, it was starting to feel really good.

The canine guarding the cell came closer, a Doberman by the looks of things. "I bet you're feeling it now. How it's stimulating you? It's feeding you see. That thing inside you feeds off your pre..."

"...but distinctly dislikes actual cum." The guard was cut off by Doctor Verizi from before. Kieran turned his head, moaning out louder as the feeling slowly intensified. If it wasn't for everything else going on, his muzzle would be buried in his own crotch right now sucking himself off for all he was worth. As it was, his hips were making weak thrusts. "You see, that's how it feeds. It stimulates you to produce pre-seminal fluids which it consumes. Cum though... that doesn't agree with it. It's going to tease you from now on, but I wouldn't expect to cum any time soon. The creature certainly won't help you. In fact, it's going to do everything it can to keep slurping up all that tasty pre and prevent any of your nasty cum from being it's food."

Kieran shook as the doctor's words sank in. "I.... I can't cum anymore?" His shaft throbbed, the words sounding worse as they came out of his muzzle. The creature reinforced this with a tickle traveling down his urethra. It was sharp at first, but it softened into more pleasure. It reached the feline's bladder and blossomed into an orgasmic sensation. A sensation that brought no relief. All Kieran could do in response was moan.

"No, and unless your master allows it, I doubt you'll cum again. That creature is permanent after all. It's bonded to your cock at a cellular level." The gleam in the wolf's eyes was sadistic, it was obvious that he enjoyed this immensely. The doctor turned to leave, "I'll leave you two to get to know one another more intimately. You will be spending the rest of your lives together after all. Oh, and your training starts tomorrow." He was about to turn the corner but stopped, "And before I forget. There will be no marking of the facilities. Another wonderful side effect of your new friend is an instant housebreaking. From now on if you want to go, you'll need to use that thing in the corner. Just stand over it, the device will take care of the rest." He snickered before turning the corner and moving out of site.

Kieran barely understood what was said. The creature inside his member had completely woken up now and boy was it hungry. As soon as the doctor had left, Kieran's muzzle and paws went down to his throbbing shaft. He could literally feel it pulsing and throbbing in his paws, waves of tingling pleasure racing up and down his length. His muzzle immediately went around the black length and began to suck. His tongue lashed around the head, teasing at all the best spots, but finding them numbed to sensation. The suckling maw and lapping tongue were doing nothing but teasing him more! With a determined stare at his own balls, he doubled down and sucked harder. It took minutes, maybe hours, but eventually he started to feel himself get closer to a real orgasm. His jaw was sore, his neck ached from being hunched over, but finally he was almost there.... Almost.... There....

Just as he would have crashed over the edge, something changed. Feeling like someone had just shoved a hot poker down his length, the parasite's ministrations changed from pleasure to pain. Suddenly, all he could think about was cradling his poor member. It lasted less than a minute, but it finally died down. Replaced by a gentle tickle in his urethra...

"But... I was so close!" He laid down, completely exhausted as the creature's teasing ramped back up. In what felt like seconds, the teasing was back to full swing, member throbbing beneath him. His hips futilely humped the air, hoping for a release that he now knew wouldn't be coming any time soon.

At some point the feline had dozed off, falling into a fitful sleep. His dreams hadn't been any reprieve. Every moment of his sleep was still filled with the ministrations of the parasite within him. The images and scenes that played out in his head were one sex-filled bout followed by the next. He woke up, a moaning whimper escaping his muzzle.

The feeling felt even stronger now, the creature figuring out exactly how to tease him as time progressed. He shifted to get up and had to forcefully stop himself from trying to hump the air.... That wasn't going to get him anywhere. He glanced down, eying the throbbing black length. A moment of realization hit him; he woke up because he had to pee.... Bad. Rising, he went over to the strange bowl contraption.

It was unlike anything he'd seen before. It looked like if he stood over it, his groin would fit perfectly inside of it. Screw that, he'd pee like he always had! He turned around, rear facing the back wall of the cell and tried to let loose. Instead of the normal warm stream and feeling of relief that he was used to, all he felt was more pressure. Whatever this thing was, it was stopping him from going! He crossed his rear legs, humping involuntarily as the added pressure only caused the parasite to send a phantom tongue down the outside of his cock. He looked over to the bowl-thing again, sneering at it before stepping over.

Like it was about to bite him, he carefully stepped over it. Ever so slowly he brought his hips carefully down, placing his member inside. Nothing happened. "Urf... I thought he said..."

"Oh, I disabled it," came from outside the cell. Kieran looked over at the Doberman guard, "Your training is supposed to start tomorrow, but I figured you can get a head start. The rule is simple, if you want to pee you're going to have to suck me off"

The leopard did a double take. "What did you say?!"

The unmistakable sound of a zipper being used filled the air briefly before he saw pink between the canine's legs, "You heard me. Why don't you come over here and help me get a load off. It's been a long... hard... day." The Doberman stuck his length between the bars, giving the feline easy access.

Kieran turned his nose up at it but then the parasite throbbed, sending him a clear reminder of how much he had to go. One blowjob, that was it! He could fight the next one, but right now he needed to pee.

The guard beckoned him over, the feline following the command shortly. His muzzle was only a few inches from the member. It was an almost purple color, covered in slick sheath fluids. Already he could see a drop of pre dangling from the tip. "That's it, get a good smell" Kieran had to admit, it did smell pretty good. It really didn't help that the only thing he could think of was sex though. The feral quickly took the tip into his muzzle, lapping along the underside of the head.

The taste of musky pre filled his muzzle which he greedily slurped down. He slid his tongue over and around the head of the canine member, hearing the Doberman groan out above him. He looked up, seeing the male hold himself close to the bars. Despite the need to go, the act was definitely having an affect on him. He couldn't help himself as his hips started to thrust. This caused him to force more of the canine's cock with each hump forward.

He quickly took the rest of the length into his muzzle. Already he could feel the canine's cock throb in time with his heartbeat, betraying just how close he was to blowing his load. The need to pee came back stronger than ever as the parasite squirmed in his bladder. With the same determination from earlier, he pressed his head forward taking the entire length into his maw. The length caused his eyes to water up as he suppressed his gag reflex, but that didn't matter. He needed to pee, and this was the way to get there.

It didn't take but another minute before he heard a huffing pant from above. Suddenly, his muzzle was filled with salty sweetness as jet after jet of canine spunk filled his muzzle. He lapped it down in his lust-induced haze without giving it a second thought, cleaning off the prick as the orgasm tapered off.

"Mmmm.... Such a good kitten. I think you've earned your potty break." The guard slipped his still swollen knot out from between the bars with a grunt before walking to the wall and hitting a button. "There, it's on..... have fun!" There was a smirk on the canine's face that told volumes, but that didn't matter to the feline.

He bolted as soon as the words were out of the doberman's mouth, quickly positioning himself over the bowl as the parasite squirmed again. This time something definitely did happen. A curved metal bar slid out from the sides of the bowl, latching around his hindquarters and holding him down. Suddenly, he felt something against his trapped member. Something was brushing against the tip, something cool and firm. "What's going on.... YIPE!" He couldn't help himself from crying out in surprise as something long and cool was shoved down the length of his cock. The parasite squirmed in protest as the rod traveled down his cock down into his abused bladder. It felt like forever to the poor feline, his cock in stimulation overload at this point as the sounding rod pressed past the sphincter in his bladder. He could feel though as immediately the pressure began to subside. His urine traveled back down the sounding rod to be whisked away. It took a few minutes, but finally he felt mostly normal.

As the rod finally pulled back, he couldn't help but shudder. It was too much, too much stimulation. He tried to hump his hips, to catch the suddenly rare orgasm. The metal bars stopped that attempt before it could even begin though. He simply had to settle for a groan and a shudder until the device slipped off of him.

With a strange humping gait, he made his way back to the bed. Each movement only caused him to feel the creature inside of him, made it squirm just a tiny bit. It had quickly learned about many spots on and inside his length that even he didn't know about, finding new ways to stimulate and deny him release. Like now, it was slowly writhing about in the base of his cock while it tightened up slightly around the base. "Ruuuurf!" The involuntary groan pierced the silence of the cell, drawing the attention of the guard.

"Poor thing," the sarcasm in his voice was palpable. "Once your training starts tomorrow, it will take your mind off of things." He smirked, taking a photo of the writhing snow leopard.

Kieran tried to sleep, tried to block out the ceaseless teasing, tried to focus on anything else. It took hours but eventually, sleep claimed him. Thankfully, even the parasite had to rest. It was the sleep of pure exhaustion, deep and dreamless.

He woke up several hours later to the best blowjob he had ever felt. His eyes stayed closed, focusing on the wonderful suckling muzzle wrapped around his cock. He could feel the warmth, the wetness of whatever creature decided to wake him up so pleasantly. The tongue of the creature lapped over his tapered tip, sliding around the underside of his length. His pleasure rose quickly, hips quivering in lust after only a couple of minutes. Just a bit more before he'd pop. Just...a....bit...

He whined, the pleasure reaching that point where he should have gone over. It hung at the edge of a razor but wouldn't go past. His eyes snapped open, looking towards whoever had his cock in their muzzle. To his surprise, there was nothing. He looked down between his legs, only to see his throbbing black-coated cock. As he stared, he could swear the tongue had just dived into his sheath. His hips thrusted of their own accord, trying to bring forth his orgasm in the muzzle that he was certainly buried in. But it wasn't to happen. He whined out in frustration, hip thrusts slowly stopping as the realization that he wouldn't be cumming finally broke through the sleep-induced haze.

He stared up at the now ursine guard staring into his cell. "Why? Why would you do this to someone?"

The guard looked back with a neutral look, "Because it works."

Kieran didn't know what this training entailed, but he was almost looking forward to it if it gave him something else to concentrate on besides this damned parasite.