Bill was home watching tv while his family got ready for Halloween. He was one angry man. He used to work at a slaughterhouse that was right outside his home. He loved that job. Mostly because he was the one that would kill the animals to be processed. And he enjoyed it sooo much. He new exactly how to do it in the most painfullest way. But no one could tell he was doing it either. He was that good. And he did that for years.
Recently, the slaughterhouse was completely closed. Due to many cutbacks and contaminated meat. It made Bill furious. He lost his job for the other workers' incompetence at their job. Now he's just sitting home, staring at the tv. Taking glances at the slaughterhouse through the window. He wanted to be back in there. He needed it. So he lied to his family about feeling ill and had to stay home. After a few minutes, he changed into his old working cloths. He could still smell the blood on stained cloths. The smell reminded him of being in the pit ending the lives of the animals put in front of him. But his adrenaline needed more. So he left the house and to his old job. He always had a key with him so he could sneak in after hours.
He stood above the pit. The same pit where they put the bovines in and he was let loose. Ending their lives. Smelling the stench of old blood that stained the walls. Remembering all the fun he had. But then reality came back and remember that he wouldn't be doing that anymore there. He SCREAMED out loud in anger yelling "IT'S NOT FAIR! WHY DID I LOSE THIS JOB! I WANTED TO DO MORE!"
Bills' yells echoed into the halls of the building. Falling on the ears of all the little critters that infested the building. He just stood there in silence. Bill was depressed after all that. Suddenly without warning something hit him. Making him fall into the pit with a thud! He got up rubbing his head. When he felt a nub on the side of his head. He must of hit his head on the fall. He got up a little wobbly when he notice his cloths were a little tight. "huh" he thought to himself and he noticed a strange light moving in the pit.
At first it floated in front of him. It looked like it even had horns. "What the..." Bill said as the ball of light zoomed right at and into his chest! It hit him with a thud and pushed him back a little. "WHAT THE $%*#!" Bill said angrily. He had no idea what that thing was, but it must be the reason why he fell. He took a step forward and stumbled a little.
He looked down to see and feel his left foot pressing hard against the front of his boot. Enough to make him stumble. Not sure what was wrong he took his hand and scratched his head. That's when he felt that same bump earlier, had grown. In fact it felt like something came through it. Even worse was that this nails felt thicker. Curious he put his hand in front of his face and noticed his nails are thicker and darker. Before he could say anything, he could see in front of him another glowing light. He stepped back in shocked when he noticed that there was another. And another. In fact there was a whole bunch surrounding him.
THUD! This time he was hit in the back. His body started to grow bigger. Bill could start feeling his body change now. He felt those bumps on his head grew bigger. As his ears pulled into points, he felt something wiggle out of his spine. His fingers became thicker and soo did his nails. And between his eyes, he noticed his nose widened and darkened in front of his eyes.
"OOOooH MY GOD! WHAT"S HAaaaaaPENING TO MEEEeeeee!?" Bill screamed. The changes stopped as he leaned against the wall. That's when he noticed a strange soft sound. "oooo, OOOO, oooo" It was all around him. He looked around trying to figure out what that sound was. He was breathing heavily in panic in fear on what was happening, looking at all the orbs around him as well as trying to find out where that sound was.
THUD! Another orb flew right at Bill and into his body. His body grew again immediately pushing his belly out in front of him and grew brown hair. His pants started to tare at the seams of his pants and shirt. His toes started to lose all feelings as his other shoe became much tighter. Ready to rip apart. His hands felt the same. Bill held his hands up to see that they were no longer hands. They were almost like hooves! And as he looked he saw, just a little, his watched his face pushed out just a bit. He raised his hands/hooves to his head in panic only to feel 2 things. One, his ears were now completely pointed and out the sides of his head. And 2, those bumps. They weren't bumps, they were horns growing out of his head.
Bill tried to speak. But it came out as completely gibberish. Nothing no human could understand. It's then he could hear that noise much clearer. "MOOOOOO, mooooo, Moooooo" It sounded like the cattle he used to kill all the time. He could never forget that sound. He tried to look around, but he kept hitting his horns at the wall. Until an orb went right in front of his face. "MOOOOOOOOO" And flew into his face with another THUD! Bill's head flew back and hit the wall. He closed his eyes for a sec from the pain, only to open to see his face had pushed out even more. His nose completely turned black. He could smell the old stench of the building soo much stronger now. Sadly he didn't enjoy it now. His body grew even more. as the last of his human skin was completely covered with bovine brown fur. To the point where his cloths were no longer able to stay on his changing body. Even the one shoe that stayed together till now completely ripped off. Showing his new hoof for anyone to see.
It was only until the new changes stopped when he realized that those orbs were spirits. The Spirits of the animals that he killed in the same pit. Bill cried and tried to apologize to them. Pleading to make them stop. But all that came out of his now bovine head was the sounds a bovine would make. He leaned against the wall to hold his balance with his big, almost fat bovine body from falling to the ground. He was human. And he can't fall to the ground like an animal. HE WAS HUMAN.
THUD! Another spirit hit Bill. Knocking him to the ground. I looked at his hands and watch the last bit of his human self change from fingers to now hard hooves. He also noticed his body grew some more. He turned to look at his body. His now bovine body. But he noticed something odd. He has seen cows and bulls of all kinds lives ended by him. But his body was different. It was fatter....And he watched his body get even fatter. He let out a loud moo as he tried to get up. He tried his hardest to get back on his hind legs, but his body no longer would be able to.
Bill was still shocked from what has happened to him. He didn't noticed that the spirits where still around him. Though they started float together. Almost like a huddle. It was when they were all together in front of Bill, that he noticed them. He was angry at them. How could these lowly beast do THIS TO HIM!!!! He started to huff and snort angrily at them and charged! He rammed right into all of them with his head, but that's what they were waiting for. As he did, he mistakenly put them all into his body.
He stopped just in time from hitting his head against the blood stained wall. Bill turned to look for the spirits, trying to find where they went. His anger was still not satisfied. He snorted looking for them when he realized his mistake. He felt his body start to bloat. His belly grew even more. It was as if his body was gaining weight by the tons. Bill turned his head and looked at his body expanding. He must of been the fattest bull he's ever seen. Probably out there. But his body adjusted for all the weight he gain. Though his guy stuck way out the sides of his no longer human body. His body finally stopped when he felt the fur of his bully scrap the floor below him.
He still snorted and made lots of racket trying to get those spirits to turn him back. But they were gone. Luckily for him, some teenagers. Who were about to tag the building heard the noise and came to investigate through the unlocked door. They found Bill all angry and fat and reported to the police. To their investigation they came to the conclusion from the tattered cloths. That Bill snucked into the slaughterhouse to get one more kill in. No one knows where the bull came from or how it became soo big. They sold the bull at an auction to a farm. Where they tried to make the bull loose weight. But no matter how hard they tried, it couldn't. Yet it lived a long, angry life.
As for Bill. He became a wanted missing person. They tried to look for him everywhere, but there was no signs of him anywhere. A good thing too. The police found out that his wife was cheating on him with a vegan and was very much happier.
But for the building, it was abandoned and no one dared to buy it. For some reason, no one wanted it. But every Halloween, a person would always go missing and a bull or cow would be found inside. Could it be Bill still trying to do what he loves to do. And killing anyone that get's in his way. Or are the spirits getting revenge from the horrors they experienced in that building to those that dare invade it. Because it couldn't be that the people disappeared turned into those animals. That would be impossible.......

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This is a piece I am entering  Team_TF Halloween Contest http://www.furaffinity.net/journal/5011678/
I had this idea and worked on it last month. I even used myself as a reference and some artist like  Kingzilla's pieces for help to make him chubby. Hope you all like it.