Symptoms Initial symptoms vary and may include feeding intolerance, abdominal distension, bloody stools, apnea, lethargy, temperature instability or hypoperfusion.
[pediatrie.be]
Poor tolerance to feedings Frequent vomiting (possibly green in color) Bloody stool (bowel movements) Redness or abnormal color to the tummy Lethargy (lack of energy) Fever Apnea
[my.clevelandclinic.org]
[…] intestinal loops Bilious vomiting Stool change (bloody mucoid) Decrease of peristaltic sounds Erythema of the abdomen wall Ascites Nonspecific systemic signs can include: Apnea
[symptoma.com]