I don't believe animals have rights. With rights come rules of law and responsibility to obey them. We don't want to get into prosecuting polar bears or tigers for eating people, or deer for destroying crops, so we should not give them the rights that people have. Welfare is a different issue for domestic or captive animals. We are responsible for them, therefore we should treat them well until they are to be slaughtered or die of natural causes, depending on the use of the animal. As far as wild animals, I believe it is in our own interest and an absolutely critical value to preserve habitats and species as much as possible. It's not the rights of the animals, though, it's our responsibility toward the planet and even our own welfare and survival.