Sixty anemic infants (25-32 weeks GA, feeding >= 60 cc/kg/day) will undergo pre- and post-feed superior mesenteric artery Doppler studies both before and after a blood transfusion. Infants will be stratified by current weight into two groups (< 1250 grams and > 1250 grams). In each weight stratum the infants will be randomized to feeding or NPO during the PRBC transfusion. Randomization will be by block design, with block sizes ranging from two to six infants. The investigator performing the Doppler studies will remain masked to the feeding assignment of the infant.