by the symptoms u r tellin it looks like a hyperactive airways. any family member having asthama? any dust or smoke prone area in ur surroundings or the childs day to day activities. poor eating can be sorted out by avoiding junk foods and untimely eating habbits and makin the food more interesting and practising family pot feeding. the chronic cough
has to be taken care of first- consult a paediatrician as soon as possible, if the symptoms improve his appetite may also show improvement.