Of course, it is better to feed dog food. Dog food contains many elements that dogs need. It is nutritious and good for the fur. If you feed rice, it will easily stick to the teeth. Over time, it will easily lead to the occurrence of dental calculus. Moreover, just eating rice will not provide balanced nutrition. Especially for puppies before 7 months, it is the best period for body growth. Therefore, It's better to go with meat or vegetables.