Jacob knew he could not let the boy go, but decided to grant the wish. It only took a uquick thought to make the front of the boy's jeans bulge.
"Auugh!" The kid gasped and doubled over in pain as he fumbled to yank the now too-tight pants. As the zipper parted, he sighed in relief, then gasped at the horse's dick and balls that now graced his crotch and belly. "Holy crap!" He touched himself, feeling the thick sheath and hefting the pool-cue sized testicles. "Man, I'm hung like a draft horse!"
A draft horse? Jacob thought about that. Using Mr. Perth's memories, he remembered a Shire farm not too far away. The owner had asked Mr. Perth to keep an eye out for a good stallion, offering top dollar for the right animal.
The boy looked back up at Jacob. "But how did you do that? Are you some kind of wizard?" He looked scared and fascinated at the same time.
"Something like that. What's your name, boy?" Jacob walked over to the kid, his own penis bginning to relax.
"Uh, Mitchell Davies, sir. I go to school with Kelly. How come she never said anything about..." He looked back to the door where the girl had run out. "Oh. She didn't know, did she?"
"That's not really important now, Mitchell. What is important is that you are going to be a horse. But I am willing to give you a little choice, if you are willing to stay calm."
Mitchell's eyes widened. "A horse!? But I don't..." He started to back away, edging towards the door. As he did, Jacob turned the boy's hands into hooves.
"One last chance. Do you want a choice or not?" Jacob raised an eyebrow.
The boy stared at his new hooves for a moment, then looked up at Jacob with a scared expression. What kind of choices do I have?"