Is she breastfed or formula? This is typically normal for both I’ve read and heard from the doctors. As long as it doesn’t go past 7 years or you notice your baby is straining while trying to go.
@Jenn breastfed
Very common with breastfed baby’s to go up to 7 days without pooping. Just means they are absorbing all the good stuff. If you have concerns with them straining or crying when they try to poop then talk to your doctor.
Very normal for frequency to change as they age