Typically higher in calories, muscle-building protein and energy-sustaining fatty acids than adult food, puppy food can be a good choice for the pregnant dog-mom. As mothers pass on nutrients to their unborn pups, serving her puppy food can also support the healthy growth and development of her babies. However, it's advised you gradually move your dog onto a quality high calorie puppy food and save it for the later stages of the pregnancy when her need for energy will be highest.\r