Wondering if anyone can offer any advice please, my little boy is 4 weeks old and formula fed and as of last night seems to have become constipated. He is now passing firm/dry little stools and seems to be straining. He’s done 3 today whilst before he was doing one roughly every 2nd day but filling his nappy when he did and it was much more wet in consistency the way it should be for his age and he seemed to be passing it easily. Just wondering if anyone knows how to help with this and what could maybe be the cause? I am going to ring my health visitor first thing and ask her for advice. Thanks x