Jen panicked, looking around the bus for anyone she could get the pill into. She noticed out of the corner of her eye a girl, just about to drink her water, as she was coughing.
Jen pounced on the opportunity, quickly handing the girl a pill she told her would "help her cough."
The girl thanked her and hesitantly downed the small, white pill with her water. Just as she swallowed, the transformative effects of the pill took effect.
She immediately dropped her bottle to the ground as her arms disappeared, her lower body shifting uncomfortably and growing at an alarming rate. Soon her lower half filled up the entire bus seat and then some, pushing her sideways against the side of the bus. However, her change wasn't over yet. Her ass and legs began to morph, her shoes shredding from her feet as they lengthened and turned into hooves. Jen watched as her thighs shrank down and ass changed, giving her the hindquarters and legs of a Clydesdale, complete with elaborate feathering and a long, beautifully braided tail, complete with a small flower at the end. Her upper body stayed the same as it was before, minus her arms, which had disappeared.
She grunted and shifted herself, her weight creaking the bus as her friend gathered her bags for her. Jen had failed to notice that the bus had finally arrived at school while the unfortunate girl was changing, and watched as Foot Girl walked off, her huge feet making getting down the bus difficult, and as the half-horse girl managed to shuffle her way standing. She stood balancing her huge ass at an almost 90 degree angle, her hips not allowing her any other angle of standing, her tail swishing from side to side as she trotted from the bus. Jen noticed the poor girl now had a massive set of balls, as large as cantaloupes to Jen's estimation, going along well with her impressive Clydesdale ass. She felt bad for her, but there wasn't anything she could do.
Jen then walked to her first period class, which she learned she shared with Horse Girl, who during role-call answered to "Amber."