Parenting guidelines can be hard to follow. Breastfeeding for at least six months, for example, can be tough when mom has to go back to work after three. But some things are non-negotiable, like giving french fries to your 6-week-old baby (that’s a don’t). A slightly nauseating study from the CDC finds that far too many mothers (and the study did talk to mothers exclusively) are giving their babies solid food way too early. And a lot of them say they did it at their pediatrician’s recommendation. Yikes.