Abstract
Many people involved in the life sciences and related fields and industries routinely cause mice, rats, dogs, cats, primates and other non-human animals to experience pain, suffering, and an early death, harming these animals greatly and not for their own benefit. Harms, however, require moral justification, reasons that pass critical scrutiny. Animal experimenters and dissectors might suspect that strong moral justification has been given for this kind of treatment of animals. I survey some recent attempts to provide such a justification and show that they do not succeed: they provide no rational defense of animal experimentation and related activities. Thus, the need for a rational defense of animal experimentation remains