Hello, my ten-year old son seems to be losing weight. Always thin and highly active in multiple sports, I was not worried. But he's started to look unhealthily thin. He eats well--a good varied diet of mostly homemade meals--plenty of fruits and vegetables, minimum processed food. He used to eat a ton, I noticed he eats less now (two bowls of oatmeal for breakfast insted of three or four!) He also has reported frequent urges to defecate, but often not passing a stool. Also he does pass a stool more frequently, and it's usually loose (but not diarrhea) but no unusual color. This pattern has been going on for a couple months now. Thanks for any thoughts.