kids with IBS

dd has had pretty dodgy bowels from day dot, it runs in my family, particularly with women. we have a very healthy diet (90% of the time), because we al have to eat to prevent constipation. anyway, dd hasn't done a proper poo in a bit over a week, i've used inner health plus, (which she has all the time) and parachoc, still no luck, and she's screaming in agony, so we went to the dr, who sent us straight up to the hospital. they did supposetries (sp), enemas, filled her up with laxatives, she did one really decent poo, so they sent us home after about 5 hours. i now have an ibs plan to keep her on track, and if she doesn't do another poo today, she has to go back to hospital.

does anyone else's kids have ibs? dd is only 2..
if yes, what do you use to keep on top of it?
tia xo