The transition to raw food should be taken slowly. Changing your dog's diet too quickly can result in diarrhea. The way dogs process raw foods is different.
In the beginning of the transition, I would recommend starting giving the new food as a treat for a day. You should closely observe the condition of the stool.
If the stool remains normal, increase the number of the new food treats and replace one whole meal of old food with new food. Keep doing this for several more days, if the stool remains normal, and your dog is healthy, we can safely assume it's safe to discontinue the old food and feed only the new food.