The Influence of Feeding Source on the Gut Microbiome and Time to Full Feeds in Neonates With Congenital Gastrointestinal Pathologies

Inclusion Criteria: * Infants with gastroschisis, giant omphalocele, intestinal atresia, mid-gut volvulus, hirschsprungs disease. Exclusion Criteria: 1. Infant has already been on feeds 2. Infants \<34 weeks gestation 3. Parents with contraindications to providing milk (i.e. drug use-cocaine, fentanyl, meth BUT oxy/suboxone/marijuana OK) 4. Complicated gastroschisis 5. Short gut syndrome 6. Additional congenital anomalies that affect ability to tolerate milk (i.e. cyanotic congenital heart disease BUT kidney disease ok)