As it turned out, Derrick did have a stall assigned, though the clerk was willing to move him into the suite with his family. Derrick shook his head. "I'd feel a lot more comfortable with horses and hay." He noted that his parents seemed relieved by the decision, and guessed that he didn't smell all that good to human noses. After promising to check back during the next couple of weeks, Derrick allowed himself to be led to the back part of the Spa, where a boy about Derrick's age took charge. Dark haired and lean, the youth was cheerful as he looked Darrick over. "So, you wanna be a horse or a guest? Just enough horse for me to work with, or I can clear up the horse stuff and send you back in a day or so."
"Horse!" Derrick didn't hesitate. "Drafter, if you can do that."
The boy grinned. "Oh, I definitely can. How far can I go?"
"As far as you can, or want to." Derrick looked down at his homely human self. "The more horse the better."
That seemed to surprise the teen, but he nodded and gestured towards the back. "I can hardly refuse an invitation like that! Come on. I'll show you to your stall."
They walked back a distance, following hallways that got plainer and rougher, obviously not places guests were expected to visit. The familiar and welcome scents of sweat, piss, hay, and horses wafted from the opening ahead, and Derrick found himself in a large stable. A mix of equines peered at him from stalls on either side. Donkeys, mules, riding horses, ponies, and some magnificent draft horses watched as he was led to a large, empty stall. "Are any of them guests?" Derrick asked curiously.
"Fuck, no!" The boy grinned. "You're the only guest we've had in a while that wants to go full beast." He turned suddenly and grabbed Derrick's testicles with both hands, making Derrick freeze in alarm. "You said anything I wanted to do, right?"
A bit apprehensive, Derrick nodded. "Yes. Anything drafter."
The boy started to massage Derrick's testicles, causing strange sensations that worked up into his belly. "OK, then. When I am done, you are going to be a perfect mate for Samson." He indicated a massive black Shire across the stable. If the name wasn't enough, the massive sheath and swinging testicles provided evidence of his sexuality.
"If he's a stallion, then I'll have to be..." Derrick's words were cut off in a gasp as the boy yanked hard. It wasn't painful, though. Instead, he felt... nothing. He stared down to see the boy holding what appeared to be his testicles dangling loosely in his hand. There was no blood and no pain. Looking under his cock, Derrick saw unbroken skin.
"A mare." The boy grinned as the testicles broke apart into straw that fell to the floor. "Whatever else happens to you while you are here, you won't be getting the family jewels back. So let's see about giving you a safety deposit box!