Lack of appetite is commonly associated with Zinc Deficiency. DO NOT ATTEMPT TO CORRECT JUST FOR THE ZINC DEFICIENCY – you need to follow the veterinarian practice of correcting for ALL OF THE PROBLEMS.
Children who don’t have an appetite frequently also have chronic constipation. Everytime they eat, they end up miserable, so they stop eating, which turns into a downward health spiral and invariably will end you up on the Failure to Thrive page.
Children who corrected their deficiency had these number of improvements: