Thank you everyone for all your input. I've gleaned from your posts and passed the info on to my son. But he's not getting back with me or returning calls.
He did go out to eat with his dad and his dad said he ate more than he'd ever seen him eat in 6 months and STILL he couldn't finish the meal. He's down to 150 lbs and losing and as stubborn as ever. Very frustrating...
His dad lives there in Utah too but he's not very influential/strong in his son's life. They have a "past" where food is concerned. (Skinny kid, verbally abusive Dad) Dad has been on meds successfully for many years so it's not an immediate issue but Dad steps lightly around food issues...
Anyway, I feel like I've done all I can do from 800 miles away. Because he is an adult, I can't twist his arm or demand compliance. Or can I????? Anyone know of a good Voodoo Hex, or Gypsy's spell??