The gold standard for welfare is the originally developed for livestock but now applied across the board:
The Moral Compass: Navigating the Landscape of Animal Welfare and Rights
(access to fresh water and a healthy diet).
Animal rights, by contrast, is a more radical philosophical position. It argues that animals have an inherent right to live free from human exploitation and use. Proponents believe that animals are not "property" or "resources," but "persons" in a legal or moral sense.