A. For an older infant or child, going five or six days without a bowel movement would usually be a problem. In younger infants, especially those who are breastfeeding, constipation is defined more by what the bowel movements are like rather than how often they occur. So a younger infant would be constipated if his bowel movements were like hard, little pellets, or if they were very large, firm and difficult to pass. Some people also consider an infant to have constipation if the bowel movements have a consistency that are thicker than peanut butter and the child strains to pass them.
Keep in mind that babies who are exclusively breastfed very rarely get constipated. After having very frequent bowel movements during the first month or two, they then begin to go much less often. In fact, some breastfed babies only have bowel movements every week or two. In these children, as long as the bowel movement is watery or soft when they finally have it, then they are likely normal and not constipated. So it sounds like your grandson doesn't need any treatment, since it doesn't sound like he is constipated. In cases like this, I personally don't recommend giving an infant prune juice or doing anything else. Giving extra water, apple juice, or prune juice would be appropriate treatments for an infant that really was constipated though.
Why do breastfed babies have such infrequent bowel movements? Most people believe it is because breast milk gets digested so well that there is not much left over to make bowel movements. Of course, once you start feeding him solid foods, like cereal, that will likely change. At that point, he will likely have more regular bowel movements and they will probably be firmer.
There are some situations where it is not normal for a breastfed baby to have such infrequent bowel movements, including:
- a breastfed baby in the first few weeks or month or life, in which case it can be a sign that he isn't getting enough breast milk to eat
- an older infant who wasn't gaining weight well, in which case it likely would also be a sign that he wasn't getting enough to eat, had failure to thrive, or some other medical problem
- a baby who had delayed passage of meconium during his first few days of life and who has had problems passing bowel movements since he was born, which could be sign of Hirschsprung's Disease