The infant is quiet and warm, lung sounds are clear, heart sounds normal. No medical history, born healthy at 39 weeks 5 days via uncomplicated vaginal delivery, he is exclusively breastfed and is up-to-date on his vaccinations. What are 5 questions you would ask the mother next?

(Include rationales for questions) What additional signs/symptoms would alert you that this​‌‍‍‍‌‍‍‍‌‍‍‍‌‌‌‌‌‌‍‍​ infant may need to be transferred to the ER?

 What are your top 3 differential diagnoses?