Not sure why but this book came to mind: https://en.wikipedia.org/wiki/The_Island_of_Doctor_Moreau https://en.wikipedia.org/wiki/The_Island_of_Doctor_Moreau "Y

Not sure why but this book came to mind: https://en.wikipedia.org/wiki/The_Island_of_Doctor_Moreau https://en.wikipedia.org/wiki/The_Island_of_Doctor_Moreau "You can’t fake the ability to turn a duck into a penguin by moving its duckness into an animal of some other species that can be replaced at runtime."