How old is your kid, can u ask the govt mom-b centre what is the normal weight and height for his age and compare. If he falls within reasonable range then u will feel better.
If not, what is his favourite food, can u make his meals more fun and interesting, like food in triangle or ball shape. Did the western doc suggest any meal supplement, like "Ensure" milk?
My boy is only 18 months old, but he is developing the same proble: dislike food and vomit