Linda, I think you are right on about Todd needing to get going fast with food and liquids!
Has he tried an anti nausea med to take 30 mins. before he eats? Have youall tried anything besides Jevity? A different mix might sit better with him. As to the sleeping- my husband did the same for at least a month after rad ended, and many folks here will tell you that the rad. knocked them cold for several months after it was over. Are you keeping track of his blood pressure?
Did he black out while trying to stand up or what? He is obviously very weak righ now. If the effort of standing makes him dizzy, have him sit up, rest a minute, put his legs on the floor and stay in that position for a count of 10 t0 15, then stand slowly. His blood pressure could be dropping when he stands. Also, I would have a cane or a walker handy in case he gets dizzy. Remember ,He's not very far out of treatment and this recovery is slow going.It sounds like the Docs are encouraged about his prognosis. That's good news. Just keep saying "One day at a time" Amy in the Oz.