If you hunt and want to make sausage with your kill, Beef fat is good way to go!
Grass-fed Grain finished raw beef fat can also boost your immune system when rendered down into tallow. It is rich in vitamins A, D, E, K, and B1.
To render you just put the fat in a large stock pot and bring to low simmer. Slowly simmer and then strain with mesh strainer and then another strain with cheese cloth or coffee filter. Then store it and its good for up to 3 months in the fridge.