I don't grind my meat because my dogs are pretty good meat and bone chompers. Anyway, I follow the Prey-Model. Basically, I give the dogs the entire size-appropriate animal - for example, if I give chicken, I give the entire chicken - head, feet, innards, the whole shebang - or if I give rabbit, the same thing (including fur even). My kids have pet reptiles so we have a source for whole prey (chickens, quail, and rabbits). But, it is hard to get the whole animal from the regular grocery store except for fish, so we just mix-and-match grocery meat parts to kinda equal an entire animal - so about 80% muscle meat (including heart, tongue, gizzard, etc.), 10% bone, 5% liver, and 5% other secreting organs like kidney/brains.
Bullie is not as active as Angus, so she gets only about 2.5% of her body weight in meat (about 1.5 lbs a day) whereas Angus is active so he gets about 3.5% of his body weight a day. So, to make it simple, I would get an entire chicken, chop it up just so it fits in several Tupperwares each containing one day serving - this way, I don't have to worry about getting the exact percentage of meat to bone to organ. I know Bullie ate an entire chicken, in 3 days, so she's good. I'd do an entire month's worth of food in about 2-3 hours and put it in my stand-up freezer that is dedicated to pet food. I always have some kind of bird, rabbit, pork parts (they can't eat most pork bones), beef parts (same thing with beef), and fish. Sometimes the goat is on sale, so I get parts of those and sometimes the boys come home with meat from a hunt (deer, hog, turkey, fish) so I use those. Then every morning, I feed the dogs their food and take out the next day's food to thaw in the fridge.
I pick up their poop so sometimes I notice that their poop is chalky so I lower the bone in the next few days food. Sometimes their poop is soft, so I add bone or lower organs. And then when Bullie starts to get loose skin on her belly, I lower the amount of food, or if she gets a little too tight, I increase the amount of food.
Yeah, it's pretty much the same thing I do with the kids... they go to a holistic pediatrician and so she gives me a list of foods to combat whatever it is the kids are feeling or whatever it is that's going around in the neighborhood/schools.
It sounds complicated but for me, it's all instinctive. I guess it's the same concept as trying to get my mom to share her recipe for some casserole - she really can't tell me how many cups of this or teaspoons of that she uses - she just says, sprinkle it and taste it and add or subtract accordingly...
Dunno if this helps at all. I guess look up the basics of Prey-Model Raw and that's what I'm doing.