The mother does not have to be allergic to cow milk for the baby to be 
sensitive to it.  Although I believe (and I don't have empirical data to support 
this) that it is more common for babies to show a reaction to cow's milk 
protein if the mother is allergic to cow's milk herself or has other food borne 
allergies.

Personally, I am allergic to cow's milk, egg whites and cashews.  My daughter 
showed no signs of food allergies, but my son did.  He had severe "colic" if I 
had the smallest amount of cow's milk--including butter.  He would also react 
to soy, but tolerated rice milk.  He also had reactions to apples and similar 
fruits.  By elminating these items from my diet and delaying his exposure (dairy 
he didn't taste till he 18 months and the fruits until he was 12 months) he was 
able to "grow" out of the sensitivities and now shows no signs of any allergy.

Hope that helps.

Lea

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