You can use any type of dairy milk (cow, sheep, goat, etc.) in this recipe that is either raw, pasteurized or homogenized. However, avoid using milk that is ultra pasteurized. For the creamiest yogurt use whole milk yogurt but to shave off calories and fat grams you can use fat-free, 1%, or 2% milk. The nutritional information calculated in this recipe uses 2% milk.
Before sweetening or adding any flavors to your yogurt, set aside 1/2 cup of your homemade slow cooker yogurt to use as the starter of your next batch.