Russell, a nineteen year old college student, walked up to the front door of Brittney's condo carrying his laptop and some papers. He yawned as he rang the doorbell. It was early Saturday morning and he rather would have been anywhere else. Brittney had told him to come over early on Saturday so they could work on their college assignment together.

He had been reluctantly put with Brittney as his partner for this assignment by their Marketing teacher. He and Brittney had never gotten along. In fact, they didn't like each other at all. To Russell, she was a spoiled, overachieving, popular girl.

They were constantly doing things to make the other's life miserable. A few weeks ago, Russell had caught her and a young college professor making out behind a bookcase in the college library. Russell was shocked, especially since he knew that she was supposed to be dating another student named Kevin. He had quickly took a picture of the scene on his cell phone without them noticing and then went and showed it to Kevin. Kevin was furious.

From what Russell had heard, it was a humiliating breakup for Brittney. Not only had she lost Kevin, but the professor had been fired and rumors of her being a slut began to spread.

That had all been a few weeks ago. He wondered if she was over it by now. He wondered if she even knew it was he who had caused it all.

The door opened and a beautiful girl with long blond hair was standing there looking at him. It was Brittney.

"Good. Come in," she said.

Russell walked inside and closed the door behind him. Brittney didn't seem to be acting mad at him. Well, no more than usual.

"Come on upstairs so we can get started," she said.

"Okay," said Russell. He followed her up stares to her room. The room had two beds in it and was big enough for two people. Brittney's roommate must have been out. Brittney's papers and supplies for the project were already laid out on her bed.

"Okay," said Brittney. "You work on the speech. I'll work on the advertisement posters."

"Why can't I work on the posters and you work on the speech?" said Russell.

"Because shut up," said Brittney. She grabbed two bottles of water off her shelf and handed one to him. "Here, incase you get thirsty."

Russell took the bottle and sat it down on her desk. He than sat down at the desk while Brittney lay on her stomach on the bed and they both got to work.

They were doing a report on advertising a brand of Tobasco sauce. For the next few hours, they continually worked on the project. Russell had to admit, they were getting a lot done. Even so, Russell was having the hardest time searching the Internet for information.

Around noon, Brittney said, "I'm hungry. How do you feel about McDonalds?"

Russell looked at her somewhat surprised. "Uh, okay."

"What do you want?"

"Uh, a large cheese burger."

Brittney got up and grabbed her car keys off her dresser. "Okay, I'll go pick us some up. Keep working while I'm gone." Then she turned and walked out the door. Russell got back to work.

Several minutes later, Russell took off his glasses for a few seconds and rubbed his eyes. He grabbed the bottle of water Brittney had given him and opened it. To his surprise, it opened up easily like it had already been opened before. But it didn't look like anybody had drank out of it, so Russell ignored it and took a drink. Then he turned back to the computer and got back to work.

Suddenly his body began to feel strange. He felt an itching on his arms and looked at them. To his surprise, dark brown hair was growing in all over his arms and beginning to spread to his shoulders. Suddenly he saw with horror his hands were beginning to change shape. He watched with horror as one by one, his fingernails fell out and were replaced by black claws. The he felt a throbbing pain as his hands lengthened and his fingers shortened and bloated while his thumbs retracted into his hands and moved up toward his wrists. The skin on his palms swelled and became padded. "HELP, SOMEBODY HELP ME!" he shouted at the top of his lungs as he stood up, staring at his new canine-like paws.

Nobody came, or even responded, as Russell felt the same kind of pain in his feet. They felt extremely uncomfortable in his shoes as they morphed into paws, so he quickly kicked them off, placing his front paws on the desk to keep his balance. Although his stretched socks were still covering them, he could feel itching on his feet as more of the thick, brown hair emerged and began traveling up his legs. He realized with horror that he was turning into an animal, most likely a dog or a wolf.

"SOMEBODY, HELP, PLEASE!" Russell felt a pain at the bottom of his spine, like it was extending. He reached one of his paws around to feel it and felt a growing bulge in the seat of his pants. Then he felt something against the skin of his leg as it snaked down one of his pant legs and he knew it was a tail.

Russell moved to the door of the room and tried to open it. But it was no good. He couldn't turn the knob with his useless paws. He began banging on the door and continued to yell for help, but nobody answered and he figured he must be the only one in the condo right then.

Brown fur was now growing in on his chest, waist, and hips, while black fur was growing in on his back. Russell felt pain all over as he saw his body slowly getting smaller, causing his pants and boxers to loosen and fall down his legs, which were reshaping and shortening into dog legs, releasing his furry tail.

Russell looked down at his groin. His testacies were now covered in brown fur and his penis was pulled up along the lowest part of his stomach, enclosed in a furry sheath. He fell down onto all fours, shouting in pain, as his ribcage slowly changed shape, pushing out, and his shoulders and hips shifted position, locking him on all fours.

The changes then moved to his head. Russell's human groans changed to canine growls and whimpers as he felt his jaws and nose push out together, forming a muzzle with a moist, black dog nose. New smells flooded his nostrils as his sense of smell intensified. His teeth fell out as new canine teeth pushed through his gums. His glasses fell off his face as he felt his ears move higher up on his head and grow into dog ears. His neck lengthened and thickened, and his former human hair was forced out of his head as brown fur grew in on his head, black fur covering his muzzle. Russell's eyesight changed as the rest of his head pressed into shape. New instincts, feelings, and thoughts bubbled into his head without him realizing it.

The pain that Russell felt seemed to go away as the changes came to an end. His shirt and socks were still hanging loose on him and felt really uncomfortable, so he quickly shook and struggled out of them. He was beginning to panic. He spotted a full length mirror on the other side of the room and moved in front of it. Looking back at him was a german shepherd. Nothing of his former self remained. He couldn't believe it. How did this happen? People didn't just spontaneously change species.

He tried to keep calm. He still knew who he was, so he still had that. It was like his mind was half dog, half human. He still had his human memories and most of his intelligence, but his instincts and feelings were that of a dog's now. He was like a really, really intelligent dog.

Suddenly the door opened and Brittney walked in. Russell's tail began to wag behind him subconsciously as he became hopeful that she could help him, even though he didn't have a clue how he was going to let her know what had happened. To his surprise, however, she didn't seem that surprised to find a dog in her room. In fact, she smiled in a way Russell could only describe as wickedly.

"Wow," she said as she closed the door behind her. "So it actually worked. Sorry, Russell, but you were the test subject for an experiment. I was hired by a scientist at this company to find someone to test their newest thing." She pulled out a corked glass vial with clear, slightly bluish liquid in it from her pants pocket and held it up for him to see. "It's some sort of retrovirus. It turns anyone who takes it into a dog. I put a little into your bottle of water. Consider this payback for ratting me out to my boyfriend and ruining my life. Plus, they're paying me a lot of money for doing this. I'm sure they'll be happy to find out their product works. But don't worry, Russell. I'll make sure you get put in a good home."

Russell couldn't believe what he had just heard. He bared his fangs and began growling angrily. Before Brittney could do anything, Russell leaped and tackled her, knocking the vial out of her hands with his front paws. The vial hit her in the chest and the cork, which Brittney had not put back in as tight as she should have, was knocked loose. Brittney screamed as she was knocked back onto the floor by Russell, the liquid in the vial splashing onto her chest, neck, and face, some of it getting in her mouth.

Russell kept on her, snapping, barking, and growling at her in anger. Brittney shrieked as she tried to defend herself. She eventually managed to push him off her and got up.

Brittney looked down at Russell angrily. "Don't do that again," she threatened, "or I'll have you neutered."

Russell's eye's widened with terror at what she just said, but he still kept his teeth bared at her. Then he noticed something happening to her arms. Thick, white hair was beginning to grow all over them. Brittney must have felt it because she looked down at her arms. Her eyes widened with horror when she saw the new fur growing on them.

"Oh, no! No! NO!" she screamed.

'Oh, yes,' thought Russell slyly to himself, quite pleased that she would soon be joining him. 'That's what you get when you mess with me, bitch.'

Russell sat down on his haunches and watched as her transformation continued. Brittney stared in horror at her hands as they morphed into paws.

"Oh, god," she said. She turned to the door and tried to open it, but had the same problem as Russell. Her paws couldn't grip the knob.

"DAMN IT!" she screamed as she began pounding against the door. "This can't be happening to me!"

The changes continued as Brittney's feet began to change, forcing her to kick off her shoes as they mutated into paws as well. She leaned against the door for support as she felt the bottom of her spine push out as her tail began to grow. All the while she kept getting itchier as the fur kept spreading over her body underneath her clothes.

Brittney cried out in pain as her body started to shrink. Her pants and panties fell from her changing waist, reveling not only white fur, but black fur as well, covering her reshaping legs and her tail. Russell could see tears welling up in her eyes as she began to sob. "I don't want to be a dog," she cried, sliding her back down the door as she sank to the carpet in anguish.

She groaned and fell over onto her side as her rib cage barreled out and her shoulders and hips shifted position, locking her in quadrupedal form. Her breasts shrank down and flattened out until all that were left were her nipples. She felt more of them appear down her belly.

Her beautiful blond hair began falling out as white and black fur started growing in on her head. Brittney's human cries changed into whimpers as her mouth and nose pushed out into a muzzle and her neck grew. Her ears changed as they shifted upwards and her skull reshaped itself. A few seconds later, the change was complete. Brittney was now a female border collie, lying on the floor with her shirt and socks still hanging off her.

Russell watched Brittney struggle free from her clothes and get up onto all fours. He could smell an overpowering scent coming from her. A really good scent. This bitch was in heat! A slick, red-tipped dog penis emerged from its sheath as he became aroused.

Russell couldn't help himself as he moved forward and instinctively stuck his nose under Brittney's tail and began to lick her already wet and swollen pussy. Brittney shuddered as she suddenly felt Russell's wet tongue on her. Despite that she knew what was happening, she couldn't bring herself to move away. She felt so horny and instinctively moved her tail to the side to give him better access. Russell pulled his nose away from her sex and then jumped on her back, wrapping his front paws around her stomach. The tip of his penis found her canine cunny and he thrust it into her, pumping needfully. Both Russell's and Brittney's minds were clouded with pleasure and lust as they both pushed against each other. Right then, they were just two dogs mating. Russell's knot passed into Brittney's opening and became lodged inside her vagina, tying them together. Brittney panted and arched her back as her orgasm rolled over her. A few seconds later, Russell gave one final thrust as he came, shooting rope after rope of his seed into her. He then rested on Brittney's back, both of them panting heavily.

Russell slid his forepaws onto the floor and then lifted a leg over Brittney's back until the two stood tail to tail, still locked together by his knot. When they came down off of their sexual highs, they both felt ashamed and Brittney felt violated by what they had just done, even if it had felt so good. Brittney knew she would now most likely become pregnant. The thought of giving birth to puppies horrified her. She glared at Russell. It was all his fault… no, she realized shamefully, it was really all her fault. If she hadn't accepted that offer from that mysterious scientist, none of this would have ever happened. Now she and Russell were both stuck as dogs and stuck together in a humiliating position with their butts touching.

After about twenty some minutes, Russell's knot went down enough that he was able to slip out of Brittney, causing a bit of cum to leak out of her pussy and drip onto the floor. They turned around to face each other. They both still felt anger towards each other, but right then they were more scared than angry. They gazed at each other, knowing they would be dogs for the rest of their lives, and that despite the fact that they didn't like each other as humans, all they had now was each other.

Epilogue: Brittney's roommate, Lindsay, found the two dogs in her room when she got home. Unable to find Brittney to ask her about them, she assumed they were strays that had somehow gotten in the house, and called Animal Control to come and take them away.

Russell and Brittney were taken to an animal shelter and soon were both adopted by a family who owned a local farm and were looking for a couple of potential herding dogs. Impressed by the two dogs seemingly above-average intelligence, the family chose them.

The family gave them both new names. Russell was now called Chief, and Brittney was now called Princess. Their lives on the farm were very simple. They could pretty much do what ever they wanted. Their only jobs were guarding the farm, controlling the other barnyard animals, and, in general, making the family happy.

Brittney did become pregnant, and nine weeks after they had first mated, Brittney gave birth to Russell's pups. There were six of them, each one a Shepherd/Collie mix. Sadly, they only got to be with their puppies for a short period before they were all sold.

One summer afternoon, Brittney was lying out in the yard on a bale of hay, tongue lolled out in the hot sun. She was coming into heat again, and she could feel it. Russell could smell her, even from inside the house, and he became horny. He climbed out the dog door and ran to her. Brittney saw him approaching and leapt off the bale of hay, becoming quite horny herself. She turned and raised her butt to him, flagging her tail off to the side. Russell needed no further invitation and mounted her immediately, and the two were soon once again lost in animalistic lust. When they were finished, they collapsed on the ground together, totally spent. Russell grinned to himself as a few lyrics from a song he remembered came to mind. 'You're a bitch, but I love you anyway.'

The End