did u take her in for any scopping test is there any related pain besides not eating and white bowel?
White stools has the potential to be serious. She needs to go to the doctor right away. The normal brown color comes from bile, so white or pale stools usually indicate a problem in the biliary tree, which provides access for the gallbladder and pancreas to send bile and enzymes into the small intestine.
She probably isn't eating because of the pain involved in a blockage.