Professor Carl Davis was proud of his invention. It had taken the man a
mere three years of trouble and toil to create the body, but will all
living things; the body is but a shell. It was another ten before he
managed to bring the semi-sentient AI on line.

Working in his basement, keeping the project a secret at least until he
was sure of results lest he loose his job at Ravensmoor University,
Professor Davis laboured almost non-stop until the day of the break
through. In a sudden burst of inspiration, the scientist devised a way
to transfer basic thought patterns from a living creature into digital
format, thus allowing him to bypass many of the hurdles that stood
between him and the creation of a true artificially intelligent
machine.

Heeding the warnings of over fifty years of science fiction, though,
the man choose not to use his own brain for the final stage of the
experiment. Instead Carl offered to watch his neighbour’s German
Sheppard Rex while they were on vacation, thus giving him the perfect
“donor” as is it were.

Hooking the otherwise friendly canine up to the machine in his
basement, the simple headset connected to the main system by a wireless
transmitter, Carl Davis grinned at the happily panting dog with
anticipation.

“I promise, this won’t hurt a bit!” the man chuckled, causing the dog
to paw the air at him, thumping his tail happily as the scientist made
a few last adjustments at the control station. Glancing at the canine,
Professor Davis took a deep breath and punched in the final code, his
machines humming ominously as the dog glanced at the bulk of the large,
clunky device that dominated all of one wall, but otherwise seemed
unaware that his brain was effectively being photocopied.

Watching the display on his monitor, Carl held his breath, the progress
bar increasing slowly, the amount of remaining memory dropping
steadily, the man completely unaware of the dark forces at work beyond
the range of human senses or computerized sensors.

After ten tense minutes, the computer announced that the download was
complete. Glancing at the dog, Rex thumped his tail again; still
unaware of what had happened. Breathing a heavy sigh, Carl took a
moment to wipe his brow and unhook the dog, his hands shaking as he
dared not glance back at his computer or wonder for the moment whether
or not any of the data was corrupted.

Scratching the German Sheppard behind the ears and giving him a dog
biscuit as a reward, the scientist soon returned to his experiment, his
nervous hands shaking as he scanned the data, unaware of how it had
been altered during his time away from the screen. Running a few tests
the man smiled at himself as he realized other possible applications of
his work, noticing a number of interesting facts about his neighbours
lodged deeply within the dog’s subconscious. Even if the animal
couldn’t make sense of everything it had experienced, a record
remained. A record that Carl could now access and understand. The
possibilities seemed endless, but that could wait.

Saving the enormous date file onto a separate hard drive for safe
keeping, Professor Davis gave the commands necessary to power up the
complex robotic body he had created. As a large panel slid away from a
relatively unadorned portion of the complex machine before him, the man
smiled at the nearly perfect replica Rex.

Sighing heavily, the scientist shook his head at the months of work
required in acquiring sufficient materials to replicate the proper
textures of fur and skin and muscles. But despite looking completely
real, the robotic dog’s body was completely inorganic. Now all it
needed was a mind.

Making sure all of the connections were secure, Carl went back to the
Rex’s copied memory data and carefully began merging it with a pre-
written bit of software that would make the new being more than just a
dog. It would be smarter, but still obedient, with a full understanding
of English as well as a few extra self-preservation subroutines. What
the scientist didn’t know, was that his program had already been
altered by forces beyond his understanding.

Merging the two halves of what was to be the new AI was surprisingly
simple, and Professor Davis didn’t question is good fortune. He made
meticulous notes about the process, being sure that he could reproduce
the same results if necessary, and then started the set up for the
final step in the process.

Setting up a data upload to the empty brain inside the robotic shell,
Carl took the dog back upstairs, feeding him and letting him out in
order to kill time. Coming back down twenty minutes later, the
scientist rejoiced at the seeming lack of problems the system had
encountered. Everything seemed perfect. It almost seemed like it was
meant to be.

Grinning excitedly, the scientist re-checked to make sure everything
was fine before switching the robot on and severing the connection.
With a soft whir of small machinery turning on for the first time, Rex
2 lifted his head and wagged his tail at his master. Shaking all over,
Carl felt a surge of joy as he saw the light in the dog’s eyes, an
unmistakable intelligence, he could tell the dog recognized him and saw
him as the alpha male.

Calling the dog to him, Carl laughed as the Sheppard hopped out of the
containment area and hurried to his master, the dog leaping up to put
his paws on the man’s shoulders before lapping at his face. “It’s
perfect!” the scientist laughed, his hands brushing the dog’s coat,
feeling the warmth starting to spread through the hard gel that made up
the dog’s muscles, “Absolutely perfect!”

*****

For the next several nights Professor Davis’ dreams were troubled, his
sleep fitful. All night new inspirations would torment him, forcing the
man to wake up several times to write down notes and to work on complex
mathematical computations before falling back into bed, exhausted.

Taking a bit of leave from the University due to stress and lack of
sleep, the man finally had his first full night of uninterrupted rest
after the third day. The next morning, he looked at all of his notes
and was shocked by what he saw.

Barely believing them the man hurriedly entered data into his computer
and ran a handful of simulations. It appeared that what the man had
invented, almost in his sleep, was the basis for nano-machine
technology. Somehow, the man had even devised a simple method of
manufacturing them. They were simple creatures, but would be capable of
enhancing his creation all the more, giving it the illusion of healing
should it be injured or even the excretion of bodily fluids when
required as well as monitoring many of Rex 2’s internal systems, making
sure he didn’t overheat or run down. They would also serve as a way of
freeing up memory space, allowing the dog’s main processor to
concentrate on being a dog.

Despite his busy schedule at the University, Professor Davis managed to
create a few thousand of the little nanites within a week. Even he was
amazed at how easy it was for him to use University resources, as well
as how quickly the ideas came to him. They almost seemed to be fighting
to get out of the man’s head at times, but it just made him smile. He
was going to be rich and famous from all the patents he was going to
have, and perhaps even be able to move out of the small town and move
somewhere large like London, where his genius would truly be
appreciated.

Programming the nanites was simple enough. Using a bit of Rex’s copied
mind, Carl gave them a degree of self-awareness and allowed them to be
creative and adapt to new situations. Rex-2 would be a survivor. Even
if some religious wing-nut decided Davis’ experiments were an
abomination and tried to kill poor Rex, the dog would more than likely
survive, heal, and be all the more skilled at surviving future attacks.
To Carl, it was becoming a brilliant plan. To the dark, outside forces
that were already infecting his mind, it was just another victory. Just
another way of penetrating the barrier between their world and ours.

After finally injecting the nanites into Rex, Carl Davis returned to
work happy and energetic, brimming over with new ideas, some of which
he even shared with his students. Not questioning his gift, the
Professor was unaware that the nanites within Rex-2 were already hard
at work, instructing the dog to go out into the world and hunt around
for the raw materials necessary to further their own plans.

As mid-September came into being, and the leaves started turning,
Professor Davis stopped referring to his invention as Rex-2, and began
simply calling him Rex. The dog seemed perfectly socialized and was
fine on his own even when his master had to work long hours. Carl
didn’t even need to supervise the dog when he went outside. Rex seemed
perfectly well behaved.

It was while Carl was at school, though, that Rex’s nanites finally
finished their modifications to his body and mind, the dog’s brain
suddenly making a connection with the darker forces that had inspired
its creation. The robot finally becoming the first vessel for their
essence.

*****

Waiting for a day when he knew his human master would be out for longer
than usual, Rex slipped out an open window and ran across town. To the
humans he passed, he seemed like a normal dog. Some even tried to make
contact with him, but the robotic canine had other plans.

Running about the neighbourhood, Rex located the other large dogs in
the area. Finding the males among them, the superior canine managed to
dominate each of them into submission, the dark thing in his brain
touching their primitive minds, infecting them subtly. It was just
enough to make them leave their yards and follow Rex.

Reaching the gates of Ravensmoor Secondary School, the now large
procession paused, Rex sniffing the air, his computerized brain
processing the information and analysing it. The dark thing that lurked
within, Rex’s true master, told him that all was as it should be.

Slipping unnoticed into the yard, the pack of fifteen dogs of varying
large breeds ran around outside of the ancient building into the wooded
area behind the sports field. There they watched and waited, Rex at
their head, the others obeying without question.

Then, as the rear doors opened, Rex let out a soft growl of
anticipation and the dogs behind him gave soft whimpers as the dark
thing poked at the most primal parts of their minds, finding it so much
easier than it was with humans.

As a procession of fifteen grade-nine girls jogged out of the school
gymnasium for what was likely to be one of their last outdoor classes,
their small, lithe bodies clad in white t-shirts and dark purple
shorts, Rex stood slowly, his head bowed low.

His pack following suit, the nanite’s enhancements became apparent
almost at once. While his human master had given rex the appearance of
genitalia, Professor Evans hadn’t bothered making them functional. The
Darkness, though, had had other ideas.

Watching as the class was lined up into three rows of five, Rex’s
cybernetic cock slid from its sheath, a thin shin of liquid clinging to
the metallic phallus as the first few inches stood out. Giving a low
growl, his pack answered with soft snuffling sounds, their own bodies
responding the scent in the air and the sight of the fifteen girls all
suddenly bending over to touch their toes at the gym teacher looked on.

As the girls all spread their legs apart, their arms extended, swaying
from side to side so their fingertips would touch the opposite side’s
foot, Rex let out a soft snarl. The signal to attack.

At first, the middle aged woman instructing the glass didn’t notice the
back of ravenous looking dogs charging out of the woods. She was too
busy watching the group of thirteen and fourteen-year-old girls stretch
and bend, their firm little bodies moving as per her instructions in
perfect unison. It made the woman feel powerful. It made her feel alive
to be so in control of such beautiful creatures. But then her power
slipped away.

Glancing up, the woman’s eyes went wide, her mouth falling open, her
body standing paralysed as she saw the changing pack. Before she could
choke out a word of warning, though, the dogs were atop the last row of
girls, their teeth biting at the back of the teenager’s shirts, pulling
and ripping at the fabric as their claws tore clumsily at the girl’s
gym shorts, the girl’s themselves forced down onto the ground by the
unexpected weight.

As the first screams went up, the girl’s in the second row almost had
time to turn before being tackled, the dog’s now howling hungrily as
they barked threateningly and snarled menacingly, the sounds of ripping
clothing and screaming and crying girl’s giving the first row more time
to react.

Turning in time to see the girl’s in the last row have their uniforms
all but ripped to shreds, their bodies held down by the large, furry
creatures whose hips bucked frantically, the first row had just enough
time to scream.

With almost a grin, Rex leaped at the middle girl, the dog’s that
flanked him following his lead, the last five girls being knocked to
the ground, held down by canine weight as the dogs began tearing at the
girl’s clothing.

“N- No!” the gym teacher managed, her limbs refusing to respond as she
caught the gaze of one of the girls in the back row. A sweet little
redhead, small for her age with large green eyes behind her glasses,
her hair done in long braids, a huge rottweiler.

As the helpless woman watched, the dog grabbed one of the now mostly
naked girl’s braids in his jaws and pulled, causing her to scream as
tears spilled down her cheeks, the dog’s hips thrusting forward. Even
without the look of shock, or the terrified scream, the teacher knew
full well that the dog had just ripped through the little girl’s
virginity, that his pumping cock was already buried inside of her.

Her eyes seemingly the only working muscles, the teacher scanned the
crowd, fear keeping her from moving as the mass of bodies writhed,
growled and screamed. By then the sounds of ripping clothing had
ceased, and some of the girls bore scratches. All were held down now,
the ones in the back row on their knees, the forelegs of the dogs
holding them tightly as the canines rutted fiercely, the girls crying
and screaming as their mates grunted and growled.

The girls in the first row weren’t much better off. Most of them were
flat on their stomachs, their legs and arms kicking wildly, their eyes
all staring at their teacher, pleading, begging as they screamed and
cried, the cacophony of words echoing in the woman’s mind as she
watched.

“No! Oww! It hurts! Stop it! This is gross! Take it out!”

Over and over the scene was repeated, dogs pressing their already erect
cocks against the soft netherlips of her students, forcing their way
inside, stretching pussies wide, ripping through maidenheads, howling
in triumph as they claimed their bitches.

Finally turning to the front row, the teacher was appalled to see the
girls on their backs, the dogs already thrusting and humping and
rutting madly, their cocks already dug deeply into their chosen mates,
brutally fucking the captured schoolgirls for all they were worth. But
what was worse was the leader of the pack. As he turned to the woman,
she could have sworn he was grinning at her.

To Rex, it was a triumph. The screaming and crying and grunting and
groaning all around him was the sweet music of life. His mind almost
fully merged with the Darkness, the dog understood the importance of
what he was doing, and took care to strip his chosen mate bare as he
could before taking her.

The girl he had chosen was a somewhat tall blond, her body firm and
athletic. She smelled healthy and fertile and her small breasts stood
up straight, jiggling as she struggled beneath him, the girl’s fists
bashing at his flanks.

Rex didn’t care, however. Pain was foreign to him, unnecessary for his
survival. Panting heavily, not for lack of breath or overheat, but
simple excitement and instinct, Rex pressed his forepaws down hard
against the girl’s shoulders, grinning at the surprised look upon her
face. He knew she thought there was no way a dog could be that strong.
But Rex’s titanium skeleton made all sorts of things possible.

Forcing his hips between her kicking legs, the dog lowered his head and
lapped quickly at the two pink buds of the girl’s nipples, his dark
brown eyes staring into her icy blues as they grew hard. Taking more
than a little satisfaction in his task, Rex growled as he felt his
metallic cock grow larger, the tapered head pressing against the girl’s
naked netherlips.

As she felt it, the girl’s eyes went wide. “No! Fuck no!” the blond
exclaimed, screaming and thrashing and struggling harder than the other
girls. It was why Rex had chosen her. She was healthy and strong. A
real fighter. He liked that.

Despite her protests, Rex didn’t stop. As she clawed and pulled at his
fur, the girl gritting her teeth and kicking her legs madly, the dog
shoved forward, the first inch of his cock spreading the girl’s pussy
wide apart before ejecting a squirt of hot lubricant into her.

Gasping, the girl’s eyes went wide, her cheeks flushing a bit as she
felt her pussy loosen up, her struggling stopping for merely a moment.
But that was all that Rex wanted. With a grunt, he shoved himself into
her, most of his erect cock disappearing into the athletic girl’s tight
pussy with relative easy, the girl arching her back, screaming in angry
betrayal as the dog took her.

Rex wasn’t surprised that she wasn’t a virgin, but he didn’t care.
Thrusting harder and harder, he caught the eye of the gym teacher and
grinned. Glancing down at his chosen bitch, the dog growled softly and
licked her neck, giving it a soft nip as he shoved his hips forward,
his cockhead slamming up against her cervix.

Around them, the other dogs were already getting excited enough that
their knots were starting to swell. As the girl’s felt the expansion,
most of them starting screaming louder, some trying unsuccessfully to
crawl out from under their attackers, others simply shaking their heads
in denial and pounding the ground with their fists.

Rex’s cock was larger and longer, however. Picking up speed, the dog
rutted harder and faster, his tapered head a battering ram against the
girl’s cervix, forcing it to slowly buckle, a tiny hole slowly
appearing.

Meeting his mate’s eyes, the girl gave him a defiant look. Her eyes
were moist, but she wasn’t crying. Panting between gritted teeth, she
snarled back at Rex as his thrusts became short and sharp, his cockhead
wedging itself slowly deeper and deeper, penetrating the girl’s womb
slowly but surely.

“F-Fuck-!” the blond managed as Rex’s cock finally passed through the
barrier, the last inch sliding in with ease as the dog’s heavy balls
rested against the girl’s wide spread labia, emanating an intense heat
that seemed to imply his potency.

Panting heavily now, the girl inhaled sharply, arching her back and
staring defiantly up at Rex as she felt the base of the dog’s cock open
a bit and a thick, almost balloon like object fill and swell just
beyond the entrance of her pussy.

Rex lifted his head at this, closing his eyes at the intense pleasure
as the sack filled with a gel that quickly hardened, simulating a dog’s
knot perfectly, and keeping the two locked together with no chance of
his seed escaping the girl’s body.

Glancing to one side, the dog was pleased to see that the large black
lab to his right now had a pair of small, girlish arms and legs wrapped
around his body, his bitch bucking her hips back at him, moaning and
groaning as the two mated. Turning back to the gym teacher, her
horrified expression was even more pleasing.

Going back to his own mate, Rex shifted his position a bit, getting
comfortable before pulling his cock back, testing the seal. Pleased to
find that he couldn’t pull out, the cyber dog starting thrusting anew.
Harder and faster than before, the dog cut down on the lubricant,
enjoying the pained expression upon his victim’s face, his shiny cyber
cock dragging back and forth against her inner walls, scraping at the
edges of her stretched open cervix, his cockhead pushing in and out of
her young, fertile womb.

Suddenly, Rex heard the first howls of canine triumph, barely drowning
out the screaming disbelief as girl’s struggled and cried, trying to
escape the sudden gush of white hot doggy cum that was filling their
pussies. The girl beneath him seemed to understand as well and gave the
dog a dark look, her face flushed with anger.

The dog just grinned at her, lowering his snout to her neck and holding
his teeth against her pale, bare flesh. Fucking her harder, Rex growled
and snarled, whether she liked it or not, she was his bitch, and there
was nothing she could do about it.

Suddenly, Rex felt a surge of pure ecstasy, one heightened as he heard
more of his pack grunting and howling as they came, and suddenly his
own gush of milky white goo shot out, flooding the young girl’s womb.

“Uuuuuggghhh!” she exclaimed, arching her back, closing her eyes and
gritting her teeth as she felt the hot, thick, syrupy fluid invade her
womb, the girl knowing that she was nearly at the most fertile point of
her cycle, hoping it wasn’t possible to get impregnated by a dog.

But Rex knew better. As he thrust his cock harder and harder, emptying
his supply of specially modified nanites into the girl’s womb, Rex knew
full well what would happen. Looking up at the still paralysis gym
teacher, the dog grinned at her, feeling the connection between his
brain and the tiny, microscopic robots that were even now swimming
about the schoolgirl’s womb, seeking out an ovum.

The woman seemed to know this, her eyes going wide as Rex’s shined with
sudden triumph, his nanite sperm finding three likely candidates within
the girl’s womb. Latching onto them in microscopic swarms, the little
nanites dug their probes deep inside the relatively huge round egg they
clung to, injecting data directly into the nucleolus of the ovums,
feeding them instructions as bits of the nanites merged with the eggs.

Shaking her head slowly, the disbelieving woman somehow could tell that
the blond girl was now pregnant. Somehow, in some way with the dog’s
unnatural puppies. Turning her head slowly, she found that more than
half of her students were now willing mates, their little legs flailing
happily, their hips bucking as the girls grunted and moaned, their own
wombs being filled with hot, potent doggie cum.

“N-Noooo!” the woman cried, tears falling down her face as even the
little redhead had a small smile upon her face as the rottweiler pumped
her full of sperm, “No! No! No!”

But it was too late. All fifteen girls were now knotted, the dogs
filling them with seed, causing the girls to squirm and moan in some
cases and whimper and cry in a few others.

As the sounds of shouting echoed from further down the field, the woman
numbly noted that people were finally coming to the rescue. But by then
it was too late. As the dogs starting pulling out their cocks, their
knots still a bit swollen, loads of milky white semen splashed out
across the ground, as well as the girl’s netherlips and thighs, marking
them all as bitches, both willing and unwilling.

Rex was the last to pull out, however, the gel in his knot liquefying
enough for him to pull out, causing his mate to wince painfully. The
dog didn’t care, though, and gave a barking laugh as he felt her cervix
slip closed behind his shaft, trapping his seed deep inside the girl.

Glancing at the approaching crowd of stunned teachers and students, Rex
gave a barking howl. As one, the dogs all stood up and started running
from the scene. Several of the girl’s called out to them, pleading,
begging for more, while others cried in shame and humiliation. The
blond girl, however, just lied there, staring up at the cloudless sky,
her body shaking, her womb feeling so very full, and somehow, she knew.
She knew that inside of her three hybrid cyber puppies were growing…