My 21 month DS used to be very regular - having a poo every day or 2 days, but gradually over the last 6 months has become every 3 and now goes up to 5 days without a poo. I once gave him a glycerine suppository that did the trick nicely but since then have been giving him a spoon of lactulose every day twice a day and an extra spoon when it comes to 4 days without a poo. He also has a lot of dried and fresh fruit and veg and I cut down his milk and wheat intake.
The thing is, I am not sure the lactulose helps him "want" to go. It makes his poo very soft, which is good, but not sure it is helping otherwise. He never seems in pain or discomfort, and apparently DH went through a patch of going a long time without pooing too, when he was small. He is quite active at the moment and I wonder if he just "puts off" going since he gets distracted by other things.
I can't help worrying though that his bowel will become stretched and it can't be good for him. I think on the continent people give their children suppositories more frequently than we do, and wonder if I should use them when he goes more than 3 /4 days without a poo. Any advice / experience appreciated.