Foul smelling stools which are arousing anxiety
among parents can be tested for disorders of malabsorption
. It is a broad spectrum of disorders wherein certain foods may not be absorbed or assimilated properly. This results in foul smelling stools. It needs to be ascertained whether the stools are bulky or there is excessive purging. Since the stool tests have come normal, I presume the disorders have been ruled out.
You can maintain a food log book and make a note of the food items consumed everyday. When there is tummy pain or loss of appetite, make a mention of it in the log book. This will help you pin point those food items which donot suit her. Rest continue the same.