There is no one-size-fits-all answer to this question, as the cause of Enfamil NEC may vary from child to child. However, some potential causes of Enfamil NEC include breastfeeding problems (including low milk supply or improper latch), diet deficiencies, and antibiotics taken during infancy or early childhood. If you are concerned that your child may have contracted Enfamil NEC, seek medical help immediately.