As some of you may know, my son has always had trouble gaining and maintaining weight. We have been to many specialists, and none have an answer for his small size. Lately, he is looking more bony due to a growth spurt I'm assuming, and I'm looking for ways to 'beef him up', so to speak. Calorie dense foods, foods that he doesn't have to eat a lot of to get the benefits from, etc. He won't eat peanut butter, though. Any meal ideas? We've also tried pediasure, but the gastroenterologist took him off because she said it was ruining his appetite for actual eating.