Thank you for your query.
I can understand your concern. However I would like you to properly record his height and weight every 3 months to know the growth pattern. The doctor must be monitoring these parameters and that is why they must have called your nephew after 6 months to review. If the doctors are suspecting growth hormone deficiency
then they shall be doing an assessment of the growth hormone. Hence your sister should ask the following questions:
1. How does the child fare in the growth graph?
2. When will the doctors be ordering growth hormone assessment?
You mentioned that your sister has to force feed the child. I suggest that force feeding be stopped and food be offered at the designated time for meals or when the child demands. The child is going to demand food when he is hungry.
I hope I have answered your query to your satisfaction.
Wishing your nephew all the best.