Millions of people live with cats, dogs, and other pets, which they treat as members of their families. But through their daily behavior, people who love those pets, and greatly care about their welfare, help ensure short and painful lives for millions, even billions of animals that cannoteasily be distinguished from dogs and cats. Today, the overwhelming percentage of animals with whom Westerners interact are raised for food. Countless animals endure lives of relentless misery and die often torturous deaths. The use of animals by human beings, often for important human purposes, has forced uncomfortable questions to center stage: Should people change their behavior? Should the law promote animal welfare? Should animals have legal rights? Should animals continue to be counted as "property"? Whatreforms make sense?...