Feeding raw and dry food close together is not good for dogs.
They digest at different rates... kibble taking much longer. If the raw and kibble get mixed inside the system the raw will stay in the body too long and could cause problems. If you plan on feeding both, the meals should be separated by several hours, at least.
All three of mine snarf their raw down like crazy. They try to act like they are still hungry, but I know better.