difficult child 2 has lost 21 pounds (13% of his body mass) in the past 30 days including 12 pounds in 6 days last week when he was at camp. He isn't hungry most of the time and is complaining of a growing lack of stamina. He has multiple health problems including being immune suppressed. I am trying to stay positive but the most likely explanations for this kind of severe, sudden weight loss in a kid like mine are really very scary. Thanks.