hi there, my son is almost 15 months old now, and gradually started walking with stumbling every two three steps. I have two three points here. 1. it's been since around 45 days, his behavior has changed, he gets frustrated and annoyed most of the time, we try to accommodate or consol with love, hug and best other way then only he becomes normal. 2. his eating habits are unpredictable, which don't help the cause. 3. instead of gaining weight he hasn't done well in last two months so, he was weighing around 11kg when he was a year old buy now he is around 9.5kg. 4. kindly advise the best possible food and how to calm him when he angry or annoyed. thanks