The Orc Cave
Tex felt the big orc chieftain come down hard on his back, the big black dragon taking the impact horns first, the force driving up the two, white bone protrusions and into his thick skull, jarring him into near insensibility. Tex was down, but didn't realize that he was out until the huge, muscular green homonid that was kneeling on his back clasped a crude iron collar around his neck, and leaned down, talking in a way that would have been whispering to an orc, but was borderline shouting to anyone else.
"Ha! Big war chief Guag captured itty bitty dragon warrior, just like big war chief Guag told him!" The orc reared onto his thick, tree trunk like legs, roaring in the general direction of his clan's cave fortress, beating his stone war club against the mountainous muscles on his torso, "Big war chief wins again! Orc chief always win!"
Tex grunted, his muzzle driven deep into the dust, his head in shambles. A handful of other, smaller orcs, all wearing the simple loincloths that were the staple garment of their primitive race, sidestepped cautiously out, carrying chains and trying to avoid the wild swings of their chieftain, who was smashing his club around into whatever took his fancy. When Guag was finished his war dance, all preformed on the back of the black anthro dragon who had been contracted to exterminate them, Tex was dragged to his feet by his new collar, just too narrow to fit over his horns, and manhandled forward on tentative feet, his head not yet clear from the shock of the impact.
"Walk faster, little child!" One of the smaller orcs said, the rest of them joining in with the jabs and laughing. 
"Little baby!" The chief jutted in, not about to allow one of his lieutenants one up him, and the orcs all laughed and hammered their chests in their gruff, manly voices. 
"Oh... my head..." Tex said, trying to stroke his dazed forehead.
"Shut up! Baby no talk, or no food," the dragon grunted at the prospect of being an orc's prisoner, let alone being stuck as one with no food. He had to get out of here. 
The orcs and Guag ebbed Tex into the clan cave, a huge construction that had been roughly hewn from bad stone, and cave-ins clearly weren't uncommon. The orc chief, easily six hundred pounds of pure, wiry muscle, kept one stony, gruff hand on Tex's neck and shoulders. One wrong move and the orc would crush him. Escape would have to wait for later.
There was a big, stone pillar in the center of the cave that clearly kept the roof up, and various fires all around it. In one corner was a rough-hewn cage made of wood. From a distance, Tex thought it would be a cage for him, but quickly noticed green figures running around inside of it: young orcs, all being manhandled around by one big, adult orc, heavily bearded behind his two long tusks. Suddenly Tex realized that, when they called him a 'little baby,' they had a more literal humiliation in mind than simple name-calling. He swallowed hard, and watched one of the bigger orcs push aside the stone slab that blocked the entrance.
"You Big War Cheif Guag's baby now, baby. Go do baby things, baby! Haha," the big, gruff orc cheif said, laughing and throwing him through the cage door. The big granite slab was rolled back into place behind him. He was trapped.
Tex tried to stand, ignoring the light-headedness that came with the blow to the head, and only managed to get to his knees before he was seized by the shoulders and lifted straight off the ground by what was clearly one of the war chief’s relatives. Instead of simply moving his eyes, this new orc, just as big and heavily muscled as Guag, but clearly much older than fighting trim, moved Tex around, while keeping his eyes still. When he spoke, it was with a deep, masculine growl.
"Who you? You not normal orc. We call you wrong orc!" The old green thing said, laughing down at Tex, "I Nagurb. Here where we keep all clan babies. You new, so you must be newborn." Tex rolled his eyes, amazed by the levels of orc stupidity. Despite it all, in his confused and exhausted state, Tex couldn't really resist as he was slung over the big, masculine orc's shoulder and carried to what clearly stood in for a changing table to orcs: a stone slab with a rough-spun wool sheet spread over it. The black dragon, most of his clothes destroyed in the fight with Guag, was quickly relieved of his tattered clothes. He struggled, of course, but was quickly pinned by the vastly larger orc, who laughed at his pathetic resistance, and, pressing the groaning dragon against the table with one hand, retrieved a small pile of what amounted to a brown, moderately clean bed sheet. 
Tex wiggled around, trying to get comfortable on the table as he watched Nagrub, clearly an old warrior, heavily adorned with badly engrained tattoos, seemingly perpetuating where scars had once been, as he folded and refolded the bed sheet into something resembling a triangle. At first he thought he was being put into a loincloth, just like the rest of the orcs, which he could stand. It was an improvement on being naked, after all. When the truth finally donned on him, looking around to see the various other orc children, their loincloths seemingly inches thick and wrapped snugly around their waists and beneath their legs, it was already too late. The big, battle scarred orc seized both his ankles in one hand, and, grunting with concentration, yanked the yelping dragon's backside right off the table. Next, he slid the heavy, thick fabric underneath him, a hole cut in the back for his tail, and dropped him roughly onto it. Next, when Tex tried to roll away, Nagrub pressed his knee down onto the dragon's chest, clearly showing his physical dominance over him, and, just like all the orc toddlers, folded the rough hewn cloth diaper up around his sides, and between his legs, before using a carved bone pin to secure the whole thing together at his waist. 
When Tex tried to jump up, to escape, the orc quickly and efficiently arrested his movement with a strong hand on his chest, pressing him back down to the cold, stone table.
"Not so fast, baby. You get red pain without this," Nagurb said, laughing, "And you get extra, 'cuz you're fussing."
Tex tried to make his mouth form words, but clearly his bump on the head had done more damage than he thought, because he could only grunt and mumble, comparable in sound and consistency to the orc children's incomprehensible banter. 
Nagrub took a lump of white, crystalline rock right out of the cave wall with his bare hands, and put it into a crude pestle that had apparently been carved right out of the cave wall. Instead of using a mortar, however, he simply crushed it with the rounded end of his club until it was a fine, paper white powder.
Nagrub grunted with the effort, before finally taking a raw handful of the powder and holding it up to Tex to smell. His eyes went wide. It was baby powder.
"N-nawait..." Tex said, or, rather, tried to say, not liking where this was going one bit, but was quickly overruled as the orc sneezed, and released his grip on the powder, quickly turning the black dragon white in a cloud of the stuff. Nagrub, along with all the other children, started to roar with laughter as Tex tried to rub the raw talcum out of his scales, face burning red with humiliation at the gesture. He was a dragon, an adult dragon! He deserved more respect than this. 
Alas, even the coating of baby powder clearly wasn't enough to sate Nagrub, who crushed another rock of the stuff and took another handful. He was having none of Tex's squirming, and, when the dragon tried to keep his closed, brown loincloth from the orc, he slapped the dragon's hand away, and emptied a half kilogram of baby powder into his already tight diaper. He reeked of the stuff, and, when Nagrub finally turned his attention to another orc child, all of which were at least Tex's size, Tex crawled off as fast as he could into a corner, hoping to escape notice as he worked on his escape. He quickly found this to be an issue, as the bone clip, clearly intended to be child-proof, also seemed to be dragon-proof, requiring some sort of trick of pressure to open. Simply pulling the diaper down wasn't an option, either, as the thick fabric hugged his form too tightly to even get a finger between it and his scale. The elastic cloth would have cut off the legs of a human, and Tex, despite his anger at the current situation, dressed like an orc infant and covered in the light, fragrant aroma of raw baby powder, trapped both in this cave and in his garments, at least he wasn't a human. 
Tex sighed his relief at that, and started toying with his pin again, hoping desperately he might stumble upon the solution, when even this luxury was taken away from him.
"Hey! You no touch dat!" Nagrub said, the ground shaking as he took huge, broad strides over to Tex, whom he dwarfed in comparison. The dragon could only manage to look frightened before he was grabbed by the arm, and dragged back into the common spaces. The little orcs hadn't bothered him thus far, but they laughed as he was pulled through the dirt over to where a crude wood and stone chest lay half opened. Tex tried to bite into Nagrub's arm, but received a rough shaking for his trouble. The orc slung him against the cave wall, stunning him, and seized one scaly arm in his gargantuan fist. "Dissl stop you, baby," the orc said, laughing his gaudy, throaty laugh, and forced something along the lines of a leather bag, stitched together with rough thread, over his hand and pulled the drawstring tight, tying it with a big, orcish knot that would be nigh impossible for Tex to bite through. His other hand followed, and the dragon repulsed against the big orc, who had just taken away his ability to use his hands. Nagrub pushed him over, onto all fours, and then pinned the dragon with a hand on his collar, which was still there. "Less gets some clothing for the baby, hehehe," the orc said, and, by clothing, he seemed to mean some sort of bonnet, totally out of place in the orc cavern, made of the same brown fabric as his diaper, and bound with an elastic leather strap which went around his chin. Tex, with his hands bound away the way they were, found himself in even more hopeless a position than he had before. 
The orc laughed at him again, and was joined by the children, "goona bees here a long time, hehe." Nagrub pulled Tex in close, his miasmic breath right in the dragon's face, "dragon baby betsta mind his manners, or big high war chief might not be so generous, next time."