"I have the body of a horse below the waist." Those were the very last words Kendra entered into the Chronivac while she was still anything resembling a human.
As soon as the command was entered, she found herself standing upright with her side facing the desktop, still clad only in her athletics shirt and sports bra. Even though she couldn't turn to see, she could clearly feel her lower body growing longer and wider: indeed, if it weren't for the fact that her entire body was firmly rooted in place, she would have almost fell over when her legs suddenly shifted proportions and she found herself standing on four sets of tip-toes, each set melting together like wax and reforming into a hard hoof.
She could also feel her legs thinning and changing shape, her rear pair becoming more like the hind legs of a horse. Looking down at her front legs as best she could, she could see them taking on a more equine appearance as well, along with the bones of her lower shoulders. Her lower body began feeling more muscular and consequently heavier, yet she could tell that her legs were still able to bear its full weight, even as it continued filling out. Even though she couldn't see, it was quite clear that her lower body was taking on the proportions of a fully-grown thoroughbred horse.
"At least it kept the speed aspect when choosing a horse body." she thought to herself regarding the Chronivac.
Her thoughts were interrupted when she felt a dull itching sensation all over her now-equine lower body, as she could faintly sense a fine coat of fur starting to grow on its sides. The fur quickly spread, eventually covering her equine half from her tail, which now hung almost to the ground like a show horse, all the way to the back of her human waist. As it finished spreading to cover her legs, she noticed that below her front, it left an inverted triangular area of exposed human skin, running from the front of her waist to about an inch or two above the level of her now-equine lower sternum.
As soon as the program released her from its grip, she looked down and couldn't help but be impressed by what she saw: a horse's body flared out from around where her hips had been to blend with the equine shoulders of her lower body, narrowing at the waist and spreading out into broad hindquarters where her tail hung swishing, only now far behind her and this time seemingly of its own accord. She had to wave it around to make sure she could still move it, and to her relief, she found it just as easy as before.
As she continued studying her lower body, she found that the fur covering it, save for the area of exposed human skin below her front, was a lustrous dark brown color which closely matched her hair and tail, giving it a dark chestnut appearance. The exception to this, however, was the fur on her hindquarters and the lower portion of her legs, which was a creamy white color, giving her the appearance of having a blanket on her equine rear and knee-high stockings on her legs.
She then turned her attention to her upper body, discovring that it had become slightly more muscular and toned than before. Soon she was drawn to a tight feeling in her chest, which felt like it was being crushed. Frantic, she pulled off her athletics shirt and sports bra, only to discover that her breasts had ballooned to a healthy C-cup, making her human torso look slim yet busty. She began fondling her breasts as her tail swished from side to side, her ardor swelling as she continued to do so. But just before climaxing, she snapped herself back to reality.
"Pull yourself together!" she told herself. "You're not an animal...not entirely."
Decidedly impressed by the Chronivac's handiwork, she thought to herself "I wonder what other changes I could make..."