Mark felt the now familiar tingling begin to spread through his body. He sighed in relief. He wasn't going to be a female mouse any longer...it hadn't been long, but he'd already felt his mind start to adapt to the new body. He knew who he had been...but now it was starting to feel right to think of himself as a female mouse.
Suddenly the vial got much tighter. No! He was in the tube, still. He was stuck! Then, with a sudden lurch, the tube shattered as Mark's body suddenly burst into growth. Yes! He was going to be big again!
He looked down and saw his fur start to shift. But...it wasn't disappearing! As his body grew, his fur went from dark brown to a reddish color...and smoothed out. It became velvety in appearance. His legs lurched out and lengthened, while his body thickened and became more massive. His snout shot out as his tail suddenly went from hairless to a glorious burst of white hair.
He knew that tail...it looked like those on the horses on the farm! No! Hooves...tail...mane...
In moments, a powerful horse stood where the tiny mouse had been. New confused thoughts spread through her mind--human, cow, mouse, horse. All...female.
No! Mark swung her large head around and looked between her lovely round haunches and saw a soft, small equine udder. No cock. He was still a girl!