Check out this chart showing the nutritional information for various whole foods for your raptor.
Excerpted from the Bird of Prey Management Series by Dr. Nick Fox and Dr. Nigel Barton. Data sources include: Forbes and Flint (2000) Raptor Nutrition. Sponsored by Honeybrook Farm and Lansdown Veterinary Hospital for the Campaign of Falconry; Nutrient content of domestic animals commonly fed to captive raptors. Raptor Research 31:267-272