As Steve looked down at himself as white fur with black spots started to grow over him as he followed the mare deeper into the forbidden zone. He could smell something amazing that made his growing cock stand at attention. The black mare looked back at him with a flick of her tail as we walked through the forest together. His body slowly shifting with each step as fur coated his legs and his chest barreling outwards a bit.
Steve watched the mare as they walked together, his mind focusing on her flanks as her tail occasionally showed her marehood. It was already starting to make him aroused as his body changed more and more, his new equine instincts kicking in. But Steve couldn't help but feel like something was wrong, his mind was slipping more and more away, becoming more feral and animalistic.
He let out a whiny as he fell forward, his hands and feet turning into hooves. The back mare looked back at him and shook her head. "Mmm, another feral... such a shame..." she nickered.
A feral? The stallion was a bit confused by that, his mind was often shifting. He moved in closer, smelling the mare, she was so arousing... so... fertile. His face was pushing out into a muzzle as a tail burst out of his butt, and he got a feeling like he wanted to mount her and breed her. His mind was already on the verge of vanishing, he could barely remember his old life, remembering being raised by feral horses in the herd.
"Mmm... a shame... but I might as well get some fun out of it," the mare said as she nickered and galloped off. Steve's eyes went wide and he galloped after her, his body still changing as he ran awkwardly at first, pursuing the mare with all his might.