Rachel was a young woman in her late teens, and she had a dark secret. She secretly fantasized about being made into an animal - she had long since fantasized about being one prior to the Regeneration Act, and now in the midst of this reality, she wanted it even more. In her more rational moments she couldn't possibly have wanted to be summoned, like many of her friends and indeed her own sisters, but the desire was now something strong.
In particular, her fantasy was to become an animal used for food. She went as far as to have her boyfriend Dan treat her like a pig, sheep or, her favorite, big birds like turkey or chicken, making him talk to her like a piece of potential food. But she knew she had to take things a step further. She wanted to really experience what it was like to be such a creature.
She knew her parents would never allow her to do such a thing. She was an adult though, legally, and could volunteer herself regardless. The idea of going into the factory farming system was one thing, but she wanted to experience a personal touch - somebody to raise her specifically for a purpose, browsing cookbooks for potential recipes. She decided that she'd transform and have her boyfriend purchase her immediately from the Center, as was permitted with volunteers. Then he'd either raise her himself, or hand her over to her parents without them knowing the truth.
The only question now was what animal she wanted to be...