A huge, black horse! Derrick neighed in alarm as his mind tried to process different vision, strong scents and sounds, and most of all, a body that was totally different and far larger. The satyr hopped down and grinned. "Just relax - it will all come together."
Bewildered, the former boy snorted and heaved, trying to get up. Four legs and hoovers did not work the same as two legs and arms, and he was massive! Confusion and bewilderment had his thoughts scattered, but the next time he focused on standing he ro0lled up and steadied himself on his forelegs, then twisted his rump up.
"There you go!" The satyr grinned up at him. "Hung like a horse and strong as one. A pure black Clydesdale stallion. Feels good, don't it?"
Derrick started to whinny in anger, but then realized he did feel great. Massive, powerful, full of energy. He was a young stallion, and his male parts were swollen and dripping, sending pleasure and the need for a mare.
"Follow me. I'll show you the pasture and some lovely mares who will be very happy to see you." The satyr started off, looking back only when Derrick did not immediately follow. "If you'd rather go back to being a human, I can do that. Or make you a mare."