Inclusion Criteria:  1. Preterm birth at <30+0 gestational weeks + days  Exclusion Criteria:  Parent(s) opt-out of trial participation. Packed red cell transfusion with concurrent enteral feeds prior to enrolment. (Infants who have received a packed red cell transfusion while nil-by-mouth are eligible; buccal colostrum will not be counted as enteral feeding). Infants where enteral feeding is contraindicated in the first 7 days after birth [e.g. Major congenital abnormality of the gastrointestinal tract (GIT)]. Previous episode of NEC or spontaneous intestinal perforation (SIP) prior to first packed cell transfusion.