Duck patties contain the entire bird except the head, feet, feathers and intestines. All the bones are grindable so bone content in duck  is higher than patties made from larger animals (only a small percentage of bones in larger animals like goat, lamb, bison and beef are grindable). Organs make up approximately 8% of the patty - this includes lungs, liver, heart and kidneys. On average over all our protiens, patties are composed of 66% muscle meat, 7% bone, 10% organs, 7% blood and 10% fat. We DO NOT add anything to our diets.