The meteoric rise of CRISPR/Cas9 gene editing technology has ignited discussions of engineering agricultural animals to improve their welfare. While some have proposed enhancing animals, for instance by engineering for disease resistance, others have suggested we might diminish animals to improve their welfare. By reducing or eliminating species-typical capacities, the expression of which is frustrated under current conditions, animal diminishment could reduce or eliminate the suffering that currently accompanies industrial animal agriculture. Although diminishment could reduce animal suffering, there is a (...) widespread intuition that it would be wrong. One attempt to justify this intuition has been to claim that inhibiting the development of species-typical functions is wrong, even if it improves welfare. This has often been couched in terms of violating an animal’s dignity. I argue that the dignity objection to diminishment fails. In the first place, it fails to apply to some of the most troubling cases of diminishment, the creation of so-called animal microencepahlic lumps. In the second place, dignity views misplace the normative relevance of species norms; I argue that considerations from evolutionary biology should lead us to treat species norms - such as the possession of typical capacities - as merely a heuristic for rendering judgments about welfare. But diminishment cases are precisely the cases where the heuristic breaks down, and becomes a bias. I close my discussion with a sketch of my Historical Injustices Approach to animal ethics, and how it may help us vindicate our intuition that diminishment is wrong without appeal to species norms. (shrink)

By many accounts, CRISPR gene-editing technology is revolutionizing biotechnology. It has been hailed as a scientific game changer and is being adopted at a break-neck pace. This hasty adoption has left little time for ethical reflection, and so this paper aims to begin filling that gap by exploring whether CRISPR is as much an ethical game changer as it is a biological one. By focusing on the application of CRISPR to non-human animals, I argue that CRISPR has and will continue (...) to result in significant shifts in the ethical debate landscape. For instance, the fact that many CRISPR edits are non-transgenic has important implications for the ethical debate, particularly the popular objection to genetic engineering that it objectionably involves “crossing species boundaries,” as well as the regulatory debate in the United States, where currently only transgenic organisms are officially genetically modified organisms. I also explore various impacts CRISPR may have on animal welfare, suggesting that although the improved precision of CRISPR suggests fewer unintended welfare problems in comparison to past techniques, the greater versatility means that more animals than ever will be engineered. Finally, I end my discussion of animal welfare issues by exploring the possibility of using CRISPR to directly improve animal welfare, for instance through introducing disease resistance. (shrink)