Girls, how do you feed your babies at 1 year and 9 months old, mine al…

Girls, how do you feed your babies at 1 year and 9 months old, mine almost doesn't eat, eats very poorly a couple of spoons and that's all, even cookies doesn't eat, fruits a couple of pieces and that's all, what should I do? What tests should I have done? Which doctor should I go to please?