What is considered constipation in a 2 month old?

[strmis]

So, I've heard that its supposedly normal for babies to not poop every day, especially if EBF, but what is considered normal and whats considered constipation? DD hasnt pooped for nearly 4 days, and is two months old. farts a bunch and had a "wet fart" yesterday, but no poop.

[strawberryprincess]

I think it has a lot to do with how baby is acting, very fussy (in pain) not sleeping, or eating, etc.  My oldest dd went 10 days without pooping when she was about 3/4 months old.  She acted totally normal, ate normally, etc.  When she finally pooped again, she just resumed her normal pooping habits, and amounts.  I felt like she just needed all the nutrients at that time, or something.