my 10MO has been extremely constipated since i gave up BF at 6MO. he is on lactulose but it has no effect and i've just been seen by a homeopath who suggested that as SMA progress is a cows milk formula he may have a reaction to it causing his constipation. i have no idea what to switch to though as all of my friends use SMA with no probs. anyone use anything else which may be gentler?