I was wondering if I could get some help with my daughter. She went in for her 12 Month checkup weighing in at 15 lbs. 8 oz. She is losing weight, and I cant figure out why. The doctors are ready to start extensive testing to see what the problem is. We have increased calories, started PediaSure, etc. to try and get things better, but she just wont gain weight..can anyone provide some reasons why, or what is this a symptom of..could there be a serious problem going on? She plays and eats great! Shes not picky, and she has a great personality!What is the deal? Thanks! :)