Kimandcarl please please please read the following:
the digestive side of cf is pretty nasty, foods are tough to digest and the caloric intake needed for a pwcf is 2.5 times the norm!
The specific carbohydrate diet is not a cure but a damn good control. My wife has cf and this diet helped her so much it was like night and day.
Here are two books witha all the information you need to know. I urge you to get them and just try it. It's hard work, lots of prep, but the results are better than the alternatives. Please read teh book and understand how teh diet works before jumping in it will help out greatly.
"food and the gut reaction" by elaine gotschall
and
"breaking teh vicious cycle" by elaine gotschall
i urge anyone with cf to read and try the diet.
:)