SamiH...he is CONSTANTLY 'straining' as such for days... (when he does get bound up other days he is fine) and nothing happens..until i step in and give him diluted prune juice of suppositries....he did finally poo yesturday..and it hurt him getting it out..and it was like concrete!!! he got 1/2 of it out..then wouldn't do any more...so i left it...layed him on the floor last night with no pants on...and he then decided to poo!!! DH was mortified!!! me..i don't care..DH has the weakest stomach ever!!! and then this morning he had poo'ed again..so am happy he has finally pooed. It is because all the iron in the formula and the rice cereal has added iron aswell...i am going to stay away from the rice cereal now...