So to continue this journey, we had found a pediatrician who was much more qualified in dealing with chronic health issues. My son's bowels were never normal so we knew there were some digestive issues. He was unable to process protein, mainly meat, but also had trouble w/ other high-protein foods. His doctor, upon seeing him for the first time and viewing the physical manifestations of whatever was wrong ordered five vials of blood tests. One of these tests was to check for Carnitine deficiency. I remember my son sitting on my lap and I sang the ABC song to him as well as some Veggie Tales songs. He was terrified!
As a side note: Carnitine effects human bodies on the mitochondrial level. To make it simple and in layman's terms, it gives one's muscles energy to work. Well, it turned out my son was severely deficient in Carnitine. So what we were looking at were a lot more tests. We had to get his heart muscles checked. Finally we found out why he was not talking. He was so expressive in his facial features and so able to communicate in other ways, we were amazed at his inability to speak. One day he did something remarkable. He was playing on his Magnadoodle. Astonished, we looked at his drawing and saw a stick figure of a boy with something inside a rectangle shape that was remeniscent of a television. Right then we knew he understood things but was unable to express. He had a frenulectomy to take that out of the possibilities of why he wasn't speaking. I doubt now that had anything to do with it.