The Association of American Feed Control Officials (AAFCO) and the US Food and Drug Administration (FDA) announced on August 2, 2024 that their long-standing Memorandum of Understanding (MOU) governing the development and review of definitions of animal feed ingredients will not be renewed once it expires on October 1, 2024. FDA described AAFCO and its relationship as “evolving” rather than “ending” and noted in a Letter to Stakeholders that FDA will continue to work closely with AAFCO and state authorities “to help ensure the safety of the animal food supply.”