"That's probably the pizza I ordered," Mary called from the bathroom. She sounded almost normal, though there was a hint of lingering distress in her voice. "Could you get it, please? The money should be on the counter."
Rob opened the door, seeing a teenage boy holding a box of pizza standing outside. "Twelve fifty-five, mister."
Rob found the money on the nearby counter and handed it to him, checking to make sure Mary had included a tip. He took the pizza after saying "Thanks," then closed the door. Setting it on the counter, he opened it and was met with the pleasant aroma of cheese and pepperoni. He took seven dollars out of his own pocket and placed it back on the counter. Mary came out of the bathroom, still in her pink robe. Rob wondered if she would ever be able to go out in public again, considering how obtrusive her udder was to clothing. And he was embarrassed to admit that he would rather be seeing Mary walking around without the robe on at all.
Mary began to pick the pepperoni off her slice. "I guess I've lost my appetite for meat," she said in a bemused sort of way. Between chews she added "I wonder why I started changing back into a cow? Maybe it had something to do with taking more of the female human vial?"
Rob didn't bother taking the pepperoni off his slice. He swallowed a mouthful of pizza before adding his own theory. "The vials might be defective," he said. "Maybe the reason they didn't tell you who the box was from was because they picked you to be a test subject."
"Well, I don't think I would mind a little more testing," Mary smiled, eating another bite. "Aside from that whole udder thing, these changes have been pretty nice."
Rob looked skeptical. He regarded Mary's prominent ears and horns. "You know, you can't go out in public looking like that. If you keep trying the vials, you might end up permanently altered."
Mary pressed the button on the vial box and watched it open, revealing its multitude of choices. "I think I'll take my chances," she said.