The sense of smell changes for some people on tx and he may be having an issue with the
foods he attempts
to eat, they just don't smell the same anymore. Try somethings that are served cold and not hot or warm, like chicken and tuna salads served on crackers or bread, raw veggies not cooked, cold hard boiled eggs not fried, cold pizza, salads and anything else you can think of that's not always cooked.