my son has had this problem for 13 years. We have had these studies all over the world and still do not have an answer of what it could be. If you firgure this out please share. This has baffled a lot of doctors world wide.
Hi, this is way after the fact but I just had an interesting conversation with our occupational therapist. My son has a developmental delay and we have eating issues. He gags while eating and she was clarifying if it was coughing during eating or gagging/choking on the food. She told me that they do a barium (spelling) for the upper gi and watch a child chew and swallow. Some kids actually have small bits of food go into their wind pipe which makes them cough when eating solid food. My boy does and always has had weak oral motor skills but he gags and doesn't cough.
Anyway, I just thought I'd mention it as more 'food' for thought.
It makes me think of reflux problems as well. Ask your pediatrician to try a medication that reduces acid secretions such as Prevacid.
http://www.webmd.com/heartburn-gerd/reflux-infants-children
oops forgot to paste!!
I am leaning towards reflux. This gives some good info. Often children who have reflux tend to get ear infections and even bacterial pneumonia. There are other indicators, but it is a start. This site gives a pretty good description and how they can diagnose. I hope the doctors can help you. Being a good advocate for our children is often hard, but so important!!!