My DS is 6 and has been on a GFCF diet for a year now with great success EXCEPT that he is increasingly skinny. His appetite is good and he will eat large portions, but he is also very active and does lots of sports (good for those so-so motor skills ...). And I guess most of the food I give him simply is not very fattening. Any other GFCF families have any ideas on how I can fatten him up? thanks!!