my daughter is 15 months she is not gaining weight...her birth weight is 1.5 and her current weight is 7.5

A. That’s Actually way too less so I’m just going to simply advise you as of now we should consult a nutritionist she can tell you as to what kind of diet plan you should follow for your child and consult a paediatrician so that the doctor can tell you after checkup as to why your child is not gaining weight properly even after eating well