I didn't eat any solid food for about 4 1/2 months. I lived on Ensure and some weight gain powder (mixed with milk) I got at the health food store. Didn't have a PEG, either, so nutrition was a real struggle everyday. Between the sore throat, sore mouth, nausea and constipation I developed an aversion to food. As time went on, however, my sense of smell improved and I began experiencing hunger. Little by little I tried different foods. I managed to eat some, but not most, of them. Keep encouraging him, and don't get discouraged yourself. He will come around and level off at the 'new normal'. Just have him make sure he gets enough nutrition and hydration everyday in the meantime.