Stevie, it's actually something that confuses a lot of people, so don't feel bad for needing to ask Babies don't always poo every day so that is not a sign of constipation. Constipation is when the poo is hard when it comes out. If her poos are hard, the first step is to try and give her more to drink. If the formula is the problem then giving her more might not help, so maybe give her some water to drink a couple of times a day. It might also be an idea to try a different formula to see if that helps. GL!