Derrick considered throwing the muck rake at the cowhand, but decided he would at least not give the guy the satisfaction of losing his cool. He used the muck rake as a shovel and struggled to get a large pile. "Not like that!" Bug came over and stood behind him, wrapping his much larger hands around Derricks and making the movements. "Point down, shove and pivot up." The sweat rolling down his chest soaked through the back of Derrick's shirt. After a couple more guided efforts, he stepped back and watched again. "OK. Better. Keep at it until you have them all done." Then he turned and walked out of the stable.
Derrick almost followed him out, but wanted to prove to himself he could do this. Down-push-lift. After a few more tries, he found that it was easier to get the large clumps up, and he found a wheelbarrow to dump the soiled straw into. It took a good fifteen minutes to get the stall clean, and he had to struggle with the 50-lb bag of bedding. Still, when he was done, the stall smelled fresh and looked inviting.
Maybe he'd do one more, just to prove he had it down. Derrick worked faster now, feeling more confident. He didn't really mind the smell so much now, but his shirt was soaked. He pulled it off and hung it on a post, then went back to work. He got into a rhythm, and found that the work wasn't so hard as before. The second stall was done in under ten minutes, and the third no more than five as he automatically continued down the line. His shorts were tight, and so were his shoes. Annoyed, he loosened his belt, and eventually kicked off the sneakers. He'd have to take a good shower after all this anyway.
He finished the first row and started back down the second before the tightness of his shorts made him finally grab them and yank them off, letting them fall to the ground. He had on his underpants, which wasn't any worse than a bathing suit. But then he stopped and looked down, paying more attention. His legs looked thicker, more muscular. And the bulge at his crotch seemed a lot bigger as well. And his chest! Derrick was in decent shape before, but now he had a definite 6-pack developing, and his arms were as muscular as his legs.
Fascinated, Derrick went back to mucking, this time paying attention to his body. Each stall completed seemed to trigged some growth, and by the time he finally put fresh bedding in the last stall, he looked like a professional athlete! His whole body was lean and well muscled, and he seemed to be a lot taller. He was dripping with sweat, and had to push back hair that flopped wetly over his eyes. Huh? Derrick felt his head and discovered that his normally moderate hair had grown out at least six inches! Which re minded him. He pulled open the waistband of his tightey whiteys and gasped. The thick uncircumcised cock had to be eight inches soft, and the bulge underneath indicated matching testicles.
"So, happy now, cowpoke?"
He spun to see Bud grinning at him. "You did a good job in the stalls, and they did a good job on you." The young man gestured over to an area with tack and a large mirror. As Derrick walked over, he realized he was now the same height as Bud. When he looked at his reflection, Derrick's eyes widened. He looked like some exotic underwear model, his shorts plastered against his skin and translucent with sweat, leaving nothing to the imagination. And he was older! Not a lot, maybe 18 years old instead of 16, but those two years made a big difference. It was like he had spent two years working out instead of just a few hours.
He flexed his muscles and twisted around to admire his new physique. There was no body hair, and though his face looked more squared off and mature, he had only the faintest wisps of a mustache that he had started growing weeks ago. Not really older, then - just a bigger, stronger version of himself.
Bud chuckled. "A shame to cover up that impressive tool you got. If you want to let everyone know what a stallion you are, get rid of the briefs. Everyone will see you as a prime stud, and before long you'll be the hottest, most in-demand male on the ranch."
Derrick stared at the young man. "You aren't serious! I can't go strutting round naked! They'd call the cops!"
"You drop them drawers right now and come out with me and I swear to you that the only looks you get will be admiring ones, and that not one person, even your parents, will expect you to be wearing cloths of any sort."