Lucas has a lot of troubles going to the bathroom. He only poops about once a day or every other day. Which for a baby, really is not that much. He's been doing that pretty much since he was born. We told the doc about it and he said that it's okay. He checked out Lucas' tummy and everything and he was all normal, he just doesn't poop very much. It's pretty difficult for him to go too, so we give him apple juice and banana baby food to help him out. So, as far as calling the doc, going once a day or every other day seems to be just fine. If you notice baby's tummy is hard though from going this little, definitely call the doc. Their tummy should stay nice and mushy, not hard.