The gold standard for welfare is the originally developed for livestock but now applied across the board:
(sufficient space and proper facilities).
While often used interchangeably, welfare and rights represent two distinct philosophical approaches to the same goal: reducing suffering. Understanding Animal Welfare: The Standard of Care
Despite the progress, the 21st century presents massive challenges for animal advocates:
The Moral Compass: Navigating the Landscape of Animal Welfare and Rights
(access to fresh water and a healthy diet).