She will be fine. I always tell myself that my nephew was four when he was diagnosed and he did pretty well without enzymes. Now we don't forget very often, but there are times that I remind my kids to take their enzymes and later find out they didn't. They are delta 508 and I have never noticed a bowel problem later as a result. I ask my kids if they notice it later and they say no. I also got to the point of not giving their teachers in Sunday School or camps enzymes for snacks. The snacks are usually very low fat and my kids don't each much of snacks anyway. It makes life a bit easier to handle it that way I think.
Sharon, mom of Sophia, 8 and Jack, 6 both with cf, Grant, 1 without cf