Just a few questions regarding elk burger .....Do you use the meat between the ribs for burger ?...Also do you just have extra lean burger ...Lean burger ?...Or do you add fat ...Beef or pork ?..Had some burger that had beef fat added to last years cow elk and find it very gamey ...I clean my animals promptly and skin and clean them spotless but not having luck with the burger...Need some one with a simple answer to fix my dilemma...Also does your burger keep for a year without turning strong ?....Dennis