Here is a very cool video from Green Smoothie Girl and a mom who changed her child's diet after the child was diagnosed with failure to thrive. Check for food allergies in children who fail to thrive.
*****PS Also check for Celiac Disease in cases of failure to thrive!******
http://www.youtube.com/watch?v=ZMiwGx3bZKE Video Link (sorry couldn't get the embed code right to post video)