To see the friction, one must look at specific modern scenarios. These are not hypotheticals; they are the current battlegrounds of animal ethics.
If an animal is a conscious subject with a life that matters to them, then the rights argument follows: No being that values its own life should be treated as a replaceable commodity. As philosopher Martha Nussbaum argues, sentience is the threshold for justice. Once crossed, the being is entitled to a flourishing life, not just a less-painful death. To see the friction, one must look at
| Welfare-focused | Rights-focused | Legal/Policy | |----------------|----------------|----------------| | RSPCA / ASPCA | PETA (People for the Ethical Treatment of Animals) | Animal Legal Defense Fund | | World Animal Protection | Mercy For Animals | Humane Society Legislative Fund | | Compassion in World Farming | Animal Equality | Nonhuman Rights Project | Animal welfare focuses on the well-being of animals
Animal welfare focuses on the well-being of animals under human care. It accepts the use of animals for food, research, work, and entertainment, provided that suffering is minimized and animals are treated humanely. The core principle is the Five Freedoms (Farm Animal Welfare Council, UK, 1965): stereotypies) to assess quality of life.
Modern welfare science measures physiological and behavioral indicators (e.g., cortisol levels, stereotypies) to assess quality of life.