You should never feed a 2-month-old infant powdered rice breastmilk in their bottle. There are several reasons why this isn't the right thing to do, like choking. Consistency of the milk can become too thickened for the infant to swallow, resulting in choking. It should never be given to an infant unless prescribed by the doctor. It should only be provided in a small quantity by mixing it with a spoonful of milk. Feed the infant by holding them in an upright position and quite slowly. This is usually a two-person job.