Based on the episode Dog Dean Afternoon, Season 9 Episode 5. This fic takes place after the episode ends, so be warned there are slight spoilers for that episode. Grossness warning! Depictions of vomiting and diarrhea! Mild to moderate swearing! Enjoy!

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Dean climbed into the impala, immediately driving back to their motel, that wasn't too far away from the vegan bakery. He needed a shower, and to clean out the back of his car, from the Colonel's carsickness. He sighed as he pulled into the motel parking lot, not realizing how much he was going to miss having the Colonel around, especially for a dog.

He got out of the impala, immediately starting to clean up the mess in the backseat.

"Damn it, Colonel!" He ground out, trying not to breathe. The smell was so strong, and intense, that it had him gagging under his breath.

"Dean?! Are you okay?" Sam asked, walking outside of their motel room. He didn't know what his brother was doing, but he heard his brother yell.

"The colonel threw up in the back of the pala." Dean ground out, spitting the pooling saliva from his mouth on the ground.

"Oh geez, I'm sorry." Sam said gently. He offered Dean a beer, wrinkling his nose as he caught a slight whiff. "That's not so bad." He said thoughtfully.

"Are you kidding?! It's horrific." Dean exclaimed, gagging softly under his breath. He put a hand to his stomach, not really sure why his stomach felt bloated and unhappy.

"Okay, okay. Relax." Sam said, holding his hands up in defeat. He looked at Dean thoughtfully, wondering why, his normally not squeamish brother, was pale and squeamish looking.

"Did we eat something off?" Dean asked suddenly, looking at his little brother thoughtfully. His hand still resting on his stomach, as he felt the muscles tensing and untensing repeatedly.

"No... You tried to eat chocolate, as a dog." Sam offered, walking into their motel and returned a moment later with his laptop.

"I didn't eat it, maybe a little bit, but not much." Dean objected loudly, not liking where Sam's train of thought was going.

Sam typed quickly on his laptop, looking frantically for information on what could be going on with his brother. "It says here that chocolate can make dogs have diarrhea and vomiting, but depending on how much you ate it could be fatal." He said, looking at his brother anxiously.

Dean frowned, not liking the sound of that. He shrugged, deciding to clean out his car, while he was already cleaning anyways. He bent over to grab something on the floor of the backseat, letting out a loud and wet sounding fart accidentally.

Sam looked up at his brother, wrinkling his nose at the sound. "Um... Dean, dogs don't have good control of when they go to the bathroom." He warned, a moment too late.

Dean jerked upright, as liquid heat filled his pants with no warning. "Damnit, Sammy!" he ground out, stiffening as it happened again. He waited long enough to feel safe moving, before taking off running into the motel room.

Sam started laughing, watching his brother run like a werewolf was on his tail. "Don't make a mess." He called after Dean.

"Shut the hell up, Sam!" Dean yelled, slamming the bathroom door shut behind him. He jumped in the shower, completely clothed, as he stripped down and turned on the shower.

The hot water washed all evidence of what happened away, before it happened again with no warning.

Dean groaned softly, wracking his brain to figure out why the spell was still affecting his body. He couldn't understand Colonel anymore, so shouldn't the rest of the effects be worn off by now?

He stayed in the shower, long past the point of the hot water running out. Every few minutes or so, a runny mess erupted from his bowels, and painted the tub. He groaned after each eruption, feeling like his intestines were on fire.

After a little while, he started sipping from the tap after each eruption, as an attempt to avoid dehydration. Even if each eruption, caused him to lose more than he was bringing in.

Sam knocked on the door after a while, wanting to make sure his brother was alive. "Dean?!" he called, slowly opening the door. He was immediately hit with the smell of awful diarrhea.

"Sammy? How long have I been in here?" Dean asked, his voice exhausted and breathless.

"About 2 hours... Are you okay?" Sam asked, not liking how warn out Dean sounded.

"Eh..." Dean started to say, as another eruption happened. "Damnit!" he ground out, panting hard as his stomach was starting to churn like he was going to throw up.

"Damn! You sound sick... Need anything?" Sam asked in concern, worrying that if Dean had been experiencing diarrhea this whole time, he had to be dehydrated.

"We have any pepto?" Dean asked, gagging harshly and causing him to retch loudly.

Sam jumped at the sound, leaving the room to look for pepto. He was relieved when he found a brand-new bottle of it, and a brand-new bottle of Gatorade. He brought both to the bathroom in time to hear Dean vomit loudly in the shower.

"Dean?" He asked uncertainly, not sure if his brother was even remotely close to okay.

"Just a sec, Sammy." Dean panted, vomiting back to back, followed by another eruption.

"You're really sick, can I help in some way?" Sam asked quickly, putting the bottles down on the table.

"You don't want to see this..." Dean gasped, vomiting heavily. He pushed the curtain open slightly, leaning heavily against the wall.

Sam rolled his eyes, before moving to Dean's side immediately. He could see his brother's eyes were red, he was shivering too hard for being in cold water, and looked beyond exhausted.

"You're feverish, whether you are human or dog, you have a fever." He said finally.

Dean nodded slowly, feeling beyond exhausted and thirsty. But he didn't dare drink anything, as he knew it would reappear almost immediately.

"Let's get you out of the shower and into bed." Sam suggested gently. "I'll lay out some towels, in case, you have an accident." He offered as well.

"I don't want you to have to deal with that..." Dean protested weakly, looking like he was about to collapse. He turned his head away, vomiting into the tub weakly.

"It's fine, Dean. I'll deal with it, when it needs to be done. Either that or I am buying you adult diapers." Sam warned firmly, knowing that Dean needed to sleep this bug off. He didn't want to clean up the mess, but if it meant Dean getting better, he'd push past the weirdness.

Dean's eyes widened in shock. "No! No way." He exclaimed, paling to ghost white as another eruption sounded.

Sam laughed briefly, before frowning at the sound. "Here, dry off. Clean up, put on some boxers and a t-shirt." He said, handing Dean a towel, and grabbed a few extra before leaving the room.

He laid the towels on the bed, grabbed a trash can, and put the pepto and Gatorade on the nightstand.

Dean opened the bathroom door after a few minutes, dressed for the most part. His shirt crumpled, his boxers hung low enough to show his hips, and he looked more than worse for wear.

Sam moved to Dean's side, pulled his big brother's arm of his shoulders, and led him to the bed. Once he helped Dean get situated, he handed the older man the pepto and Gatorade.

"Just take the med, and couple sips. Then you will be fine, to sleep. There is a trash can beside the bed, over some towels in case you miss." He said calmly, not wanting Dean to feel too awkward.

"Thanks, Sammy." Dean slurred softly, after choking down the pepto and a few sips of Gatorade. The older man fell asleep, almost immediately, too exhausted to do anything else.

Sam stayed up for a couple more hours, making sure Dean didn't need anything. He was relieved that Dean never had an accident, or even threw up again. 

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Dean woke up the next morning , feeling fine. But avoided chocolate like the plague for a a good month. 

I hope you enjoyed this little fic. As always: vote, comment, and request away! Love ya all! <3