Premixes/Meal Completers for Raw Diets?

Hi! We're getting our long-awaited (my entire childhood) GSD pup this Saturday and while I've done tons of research on food I think I'll always have questions. So here's one.

My uncle and cousin (soon me as well) hunt at least two deer every year, but they also raise grass-fed (corn-finished) cattle. Now, there is always an abundance of ground meat each time because select cuts are just that. Getting their processor to do whole ground (bones, organs, muscle) isn't an option, but I know there are premixes/meal completers out that to close the gap in terms of nutritional balance.

So what are some you guys recommend?