After a minute, Mary knew her choice wouldn't be easy. When the number of vials seemed to be in the thousands--despite existing all in one box--Mary was having quite a hard time coming to a decision. Her stomach grumbled, interrupting her thoughts.
"If I'm gonna choose something, I might as well choose now," she thought. She closed her eyes and plucked a random vial from the box. The picture on its label had a distinct white stripe on its tail. Mary's nose instinctively scrunched up at the thought, but then her rational side told her that skunks don't always smell bad, they just spray when they're defending themselves. Knowing the change was always reversible, she gulped down a third of the potion. It tasted sour, but not revolting. Mary puckered her lips as she swallowed and put the vial back in the box.
She quickly set about making dinner, partly due to hunger and partly just to get the taste out of her mouth. She whipped up a large dinner and scarfed it down, occasionally taking her mind off her hunger to check her body for any changes. It wasn't until she was washing her dishes when she noticed a few things. First, her skin was incredibly itchy. There was also a sore spot just above her butt. While she was washing the last dish, she kept checking her arms for fur. She was so distracted by the coming change that she didn't notice the kitchen counter was just a bit higher than it usually was. Her rolled-up sleeves kept slipping down and she had to pull them back up every so often in order to keep an eye on her arms.
Her initiating transformation hadn't done much for her stomach, however. Still a little hungry, Mary opened a box of cookies she had bought and munched on a few as she went into her bedroom. There, she took off her socks and her skirt and examined the sore spot in her lower back, knowing just what she'd find there. Sure enough, a short stub was growing out, and it was covered in black fur. It was only a few inches long, but she could see it forming ever so slowly.
She yawned. All that eating after a day of unbelievable events finally made her tired. Her stomach was full at last, and she knew the changes were going to take some time. She flopped down on her bed in nothing but her underwear and shirt. Her skin tingled as black and white fur slowly emerged from every follicle on her body, but even this strange feeling wasn't enough to keep her mind from drifting off to sleep.