The muscle and organ meats used in the Lamb diet come from Wisconsin-raised lamb. It is a nearby farm in our area and we visit it frequently. The lamb are naturally grazed and live in a clean, humane setting. Nature's Menu Lamb Diet has no growth horomones, no antibiotics, no irradiation, no preservatives! Guaranteed Analysis for Lamb Diet: Crude Protein....Min. 20% Crude Fat........Min. 15% Crude Fiber......Max 1% Crude Moisture...Max 56% Ingredients: Lamb muscle meat, lamb liver, lamb heart, lamb kidney, lamb spleen. see the Vitamins & Minerals tab for further details. Nature's Menu meets and exceeds the standards set by AFCO for both dogs and cats. The vitamin and mineral analysis is available upon request.