It is a great way to lose weight in a hurry too.
Its all protein and zero carbs, but most significant for weight loss is all of the ensuing projectile vomiting. Studies have shown that projectile vomiting burns significantly more calories than regular vomiting...

Pork, beef, deer, chicken, turkey, calf .... all good liver.
Always kept squirrel and rabbit liver too.
Good stuff.

Oh yeah, can’t beat duck, goose and swan liver also.

Also great source of iron as well.

Ive never seen anything in a deer liver and I cube mine up. The first meal after a kill is the inside oyster loins, heart, and liver and could feed more than half a dozen people for a kill party. I did tongue once, it was good, but was too much work for what you get.

You got things wiggling around in your livers? Yuck. People eat crappie like that... I figure there's plenty enough of them without wigglers.

It tastes great. I used to hate liver, but my taste buds changed I guess.