You'll find it easiest to follow the Frankenprey menu. I'll link the example below. You'll have 1.5 meals heart, 1.5 meals organ (you can do 1 full heart meal, 1 full organ meal and 1 meal of half heart and half organs, or if you struggle with that you can do 3 meals of half heart + half organs), 2-4 meals of muscle, and 7-9 meals of bone-in. This all totals to the 14 meals a week (2 meals a day for 7 days). The amount you use for the bone-in will depend on your ferrets' ages and poops. Kits require more bone than adults. Dry, chalky poops mean there is too much bone, but soupy poops (other than after organ meals) mean too little bone in the diet. holisticferretforum.com/natural-diet/raw-diet-the-meat-of-the-site/basic-frankenprey-menu/
If you strive for balance over the course of a week that works really well. With frankenprey we are trying to mimic what would be a natural diet. A weasel or pole cat in the wild wouldn't eat balance daily with a larger catch. They would eat say the head one day, innards another, legs a third, etc.
Ferrets: Contessa, Frankenfurter, Butterscotch. Kitties: Watson, Oskar DIP Sinnead, Vincent, Boris, Zeus and Athena, Willow, Mr. Frodo, Indie, Lucrezia, Judge, Odin, Miss Emily, Suki, Cody, Aristotle. RIP Herne, Ligeia, and Mr. Stubbs