I was hoping more people would respond here because I would like to mix my next pup's food with raw also. I was of the understanding (and I could be wrong) that you can give raw in one meal and kibble in another, but that it's not recommended to mix the raw and kibble. Apparently they have different digestion rates and it can cause tummy trouble. So that said, a raw chicken back/neck for breakfast and kibble for dinner would likely satisfy and meet your dogs nutritional needs.
Just guessing though, hopefully with this bump somebody will answer who has actual experience with this.