Eating Kosher??

We had to take Zoe to the pediatrician today since I found blood in her diaper yesterday. I've had trouble feeding her sometimes--she just screams and cries--and often acts like her tummy hurts. At first I attributed it to reflux, but that is doing a lot better and we were able to stop her medication. I also thought it may be due to an oversupply of milk that was causing her to be so fussy and not eat well. However based on the bloodwork they did today, the doctor now thinks Zoe's symptoms are from a milk protein allergy. I can do one of two things--start her on soy-based formula or cut out all dairy products. At first it seemed fairly simple--no cheese, milk, yogurt, butter, etc. But I started reading the diet they gave me and its amazing how many products have milk or have been manufactured in plants that make other products with milk. Even the slicer in the grocery store deli needs to be cleaned from slicing cheese before slicing meat. One of the items the diet mentioned looking for is pareve foods. They generally have not been exposed to milk during processing. It occurred to me that if I start using some of the Kosher cooking methods, I will have more access to recipes already designed to eliminate dairy products since meat and dairy are not mixed in the same meal. I am wondering if any of you have had this problem with a child and what choices you made for feeding them. I'd love to hear your ideas or suggestions. Its a relief to finally know what is causing the upset tummy and feeding issues.