Hi
Firstly mother’s milk is the best milk. Try to feed the baby as much milk you can get. After each breastfeed, give him formula. Recheck whether milk is being prepared in correct dilution( for each spoon of powder, 30ml of boiled and cooled water should be added). After each feed, burp him for 15-20 minutes on your shoulder.
Next Steps
Try Similac Advanced milk powder if same condition persists.
Baby might be having Gastroesophageal reflux, a completely curable and common newborn issue- May require medication for the same.
Health Tips
Correct milk dilution and burping!