Animals are not ours to use for experimentation. They feel pain and fear just as we do, and their overwhelming natural inclinations – like ours – are to be free and to protect their own lives, not to be locked in a small cage inside a laboratory, where they are subjected to abuse and suffering that would be illegal if they took place anywhere else. No animal should ever face being genetically engineered to develop cancer, as mice are; being intentionally paralyzed from brain damage, as monkeys are; or being force-fed pesticides and other chemicals, as dogs are.