When my lb was born, he pooed pretty much every time that he fed. This reduced to 2-3 times per day, then at 5 weeks he didn't poo for 7 days then did 2 poos in one day, one the next day and then nothing for a week, where again he did 2 poos in one day and now we're on day 7 of nothing. He has a lot of wind, but I put that down to him swallowing a lot of air due my my forceful letdown.
He strains before he passes wind, but is otherwise a content child and is gaining weight well.
Should I be worried?