Abstract: A method for imparting sustainability credence attributes for animal source food products is provided. First, at least one animal source food product is produced. The manure associated with that production is collected and treated, and the nitrogen and phosphorus content of the manure is analyzed and time stamped. At least one sustainability outcome from the treated manure is quantified, and an animal source food product, including a product package, animal package lot, individual live animal, or a plurality of live animals, is identified and labeled, and direct and indirect sustainability outcomes are linked with the animal source food product. Sustainability outcomes are demonstrated to buyers or post-processors of animal source food products, first by combining the sustainability outcome data and food animal production data with food animal producer provenance data from the same or a corresponding time interval, and then by providing access to that data.