is the mom using bags for freezing??? If so,have her check the smell of the bags BEFORE using,as vinyl and other products often have an odor when improperly packaged. Haven't you noticed this even with glad bags that food tastes of the odors from the bags being packaged prior to proper cooling. I once called the manufacturer of such bags regarding the smell/taste and was told to return them to the store for the above reason on improper packaging. Using the herb goldenseal also causes a smelly milk.Denise Ferrell