I too have had a huge weight loss...people around me who have looked at me/perspective for years are more worried. I can't seem to gain, but weight is stable. Focus on how he feels....is he physically weak? It just recently dawned on me that this is going to take more than 6 months..it may take 1-3 years to get back where/who I was. I am not who I was pre surgery in re: what foods, how many etc and it breaks my heart. This is the brain-training we've done and now have to rewire our thoughts. I have spent a lifetime of can't have this, can't have that, shouldn't etc...it's all very different now. Just be sure to eat proteins and get lots of calories...throw the old rules out the window for now...and do muscle building/resistance exercise.