The integration of digital twin technology in agriculture presents a promise for enhancing animal welfare, particularly within livestock management. This article explores some ethical implications of employing digital twins in agriculture, guided by the established Five Freedoms for Animal Welfare framework. Through a thought experiment, "The Virtually Perfect Barn," three hypothetical scenarios are examined: the ideal operation of digital twins in optimizing animal welfare, the consequences of system failures, and the ethical dilemmas posed by restricting natural animal behaviors for the sake of efficiency and safety. Each scenario delves into potential benefits and ethical pitfalls of implementing digital twins, revealing complexities of balancing technological advancements with the intrinsic value and natural lives of agricultural animals. This analysis underscores the nuanced ethical landscape of digital twin technology in agriculture, emphasizing the need for a critical and balanced approach to ensure that technological interventions genuinely serve the welfare and best interests of animals. Moreover, the paper highlights other important aspects to the ethics of digital twins in agriculture such as chickenization and the greater (human) ecology. By engaging with the Five Freedoms framework, the article contributes to the ongoing discourse on ethical considerations in agricultural technology, advocating for responsible innovation that respects and enhances the welfare of animals under human care.