Milk Fever In Cows Milk Allergy Question?

Milk allergy question? - milk fever in cows

My 4-year-old daughter suffers from an allergy to milk protein (not lactose intolerance) and took a very long time for doctors to determine this number. At that time it was for allergy testing, which was 3 years old and had 3 operations in the sinuses and ears because of all the problems that had sent them. The strange thing is that she had no problem until it was all one years, when we started the cow's milk. But she was the bottle feeding during the first year, the whole cow's milk based formula. Then I asked how he could be. She was not sick a day old one years ago, but was ill, her birthday party (with what looked like a bad cold), about 2 weeks after being switched to cow's milk. Thus, at least once a month, until the milk from your diet would be a fever with severe infection or sinus or ear, sometimes accompanied it. Why this problem, when I in the formula?