LO havent poop for 4 days

Formula-fed babies typically poop three to four times a day; however, some go as long as three or four days without a bowel movement. As long as your baby's BMs are soft and passed without a struggle, you don't have to be concerned.

It can happen, especially with formula feeding. If baby’s active, feeding and sleeping well, you can continue to observe for now. But if it persists beyond a week, then see a doctor:)