My friends daughter seems to always be hungry, although taking in tons of calories a day. They are waiting to have more testing done, as she was in the high 30's on her sweat test. Is it normal for a 2 year old to be consuming an estimated 1800 calories a day, hardly gaining weight, and never seeming full? They have upcoming appts with their ped and a GI, but I told her that I would see if I could get any input from this forum. Thanks