Many believers in animal rights and the relevance of animal welfare do not critically examine their basic assumptions […]. Typically these individuals hold two conflicting views. The first view is that animal welfare counts, and that people should treat animals as decently as possible. The second view is a presumption of human non0interference with nature, as much as possible. […] [T]he two views are less compatible than is commonly supposed. If we care about the welfare and rights of individual animals, we may be led to interfere with nature whenever the costs of doing so are sufficiently low.

Tyler Cowen, ‘Policing Nature’, Environmental Ethics, vol. 25, no. 2 (Summer, 2003)