"I wanted to be one of the big horses, a draft horse. Not a small horse like this! I'm smaller than the other boys in my class, and I thought this would be my one chance to be bigger than anyone else."
Anna snorted. "Then why didn't you tell them at the office? They always need draft horses for work. They would have been glad to have another Clyde or Shire."
Randy sighed. "Because my parents wouldn't let me be a draft horse. They are afraid that I'll like it too much and want to stay."
"It's just for a week!" Anna stomped a hoof. "Why are they scared?"
The boy hesitated, and then said "Because I told them I want to be a draft horse forever, not a human."