"A fine job!" Mica was startled by Robin's booming voice as the Innkeeper strode into the stall. The huge animal snuffled at him curiously, then lipped the man's shoulder affectionately as Robin rubbed his chin and neck. "Gentle, friendly, and content. Perfect in every way. I have to admit that I doubted if you would go through with it."
Mica stared at the former centaur, unable to spot anything that marked him as anything but a healthy young stallion. The Shire snuffled at him as well, perking its ears at the familiar scent of its own semen. Although he felt guilty, Mica had to grin as the animal lipped and licked his face, and then rubbed its massive head against his bare chest. "He still likes me, I guess."
"Not to worry, boy." Robin chuckled and tousled Mica's matted hair. "He is totally content, probably more so than he has ever been in his life. And he has a long future as a healthy, happy beast of burden, not to mention being prime breeding stock."
"But..." Mica frowned. "He is an animal now. What about his friends, any family? What about his memories, his dreams? What about his soul?"
"Such a deep thinker, you are!" Robin laughed. "As you already noted, he is an animal now. Human memories and dreams may still be in his head, but his equine mind will only find them confusing and irrelevant. And as for his soul? Souls cannot be damaged by mortal men, but they can be altered. He is a Shire stallion, with the soul of a horse. Within a day or two not even the most powerful Cleric or Mage will be able to distinguish his aura from that of a born animal. Will that ease your torment?"
Mica wiped the horse semen from his face, feeling oddly excited and more than a little aroused. He did not want to look Robin in the eye, for it was not torment he was feeling. Even the slight guilt was fading, leaving a growing sense of accomplishment, even pride in turning the centaur into such a fine beast.
Another chuckle and tousle of his hair forced Mica to give in and he found the innkeeper grinning at him. "Feels good, doesn't it? Don't bother to deny it, boy. You loved turning him into a horse. Right now you are so excited that big cock of yours could be used as a weapon. Go on, pleasure yourself. There will be time tomorrow for my best-ever stableboy to muck stalls." Robin left.
Mica straightened up the stall automatically, making sure the Shire had fresh water and straw before closing the gate. His skin was still sticky with semen and sweat, but he did not want to wash it off. His nostrils were full of the odors of piss and sweat and dung, and the rich horse smell. Grabbing his swollen cock, he started masturbating himself as the Shire calmly lipped up straw. The formerly prissy, clothes-conscious do-gooder apprentice wizard was now a filthy, naked stable boy who turned innocent victims into animals. And as he grunted in pleasure and arched back, Mica realized he really liked the change!