From what I have learned from a few books and sites I have read the guidelines for homemade food without using bones is this:
65% meat
10% organ
25% veggies
1 tsp of fresh ground eggshell per lb of food fed
Salmon oil daily
Vitamin e daily
I also add in a mineral and vitamin mix and a probiotic and digestive enzymes
If your dog doesn’t keep weight on with this you can increase the veggies to 40%, using mostly sweet potato or regular potato or a winter squash and use 10% organ and 50% meat
Yogurt isn’t enough of a calcium supplement, it balances itself but not the entire diet
You can also add fish a few times a week and eggs if they work for your dog
