Blood in stool
Other forms of immunologic reaction to milk are cow's milk induced proctocolitis & enterocolitis (fpies).
These typically begin in the newborn period and are often due to traces of cow's milk or soy present in breast milk. In proctocolitis the infant passes stool with streaks of red blood. In fpies vomiting
begin 1-2 hours after feeding
& may be accompanied by prostration and shock