was actually just reading this article
Why Organ Meat Is Important For The Raw Fed Dog | Dogs Naturally Magazine
I feed a mix of prey model and ground, the ground I feed in the morning, prey model at night for time allowances.
You need to ensure if you choose a premixed that it contains 80% muscle meat, 10% bone, 10% organ 5% of which should be liver.
Don't buy brands that contain vegetables and fruit, you want to ensure your dog is getting a proper balance and they shouldn't count to that, save them for treats if you choose to feed them at all.
Make sure that you rotate the protein source and if you can find it add some green tripe to the diet. My dogs on the prey model side of things have beef brisket and lamb shank, the bones are cartillage so very soft to chew and they get lots of meat from them too, they get whole sliced rabbit and beef cheeks all served frozen. It slows them down and they get a good bit of mental exercise trying to work around it. For the evening meal I also serve them ground up organ and tripe in a meal size % portion and freeze them. I just leave them out when the get to work on dinner and when done they get the thawed organs.
The pre-ground is a balance as I've mentioned above.
In Canada we have several great raw food companies that sell the premixed, Bold Raw, Mountain dog food, Tollden Farms and Raw Paw are ones I'm familiar with.