My daughter (9yrs) eats extremely slowly and she is very slim (under 4st) i need advice in helping to increase her appetite to gain weight?

Not eating : This is not so simple. We need to have a good history including birth weight, family history, dietary history, do a physical exam to determine what is the reason. We also need to plot her on growth charts too.

Calories & protein: The addition of calorie dense foods such as nuts, whole grain pastas, raisins, whole milk, pure fruit juices, butter, avocado, and complex carbohydrates is a healthy way to add more calories to the diet. Lean proteins are also important.