Not really sure what a DAN doctor is, that is anew term for me. HOwever, I am actually studying child development in grad school. I do have three children myself (10, 6, and a 18 mos old). My daughter has had sensory issues foir a fews years now. She was treated by a physical therapists. It sounds like it could have potentially sensory integration issues, meaning his brain process information around him differently. It has to do with the way the nervous system works. Occupational therapists are the ones who would treat this and potentially tell you whether or not this is the problem. Would you mind if I suggest a wonderful book. "The Out-of-Sync CHild" by Carol Stock Kranowitz. It is a great book and if nothing else, you mind somethings to try with your son at home to help. Good luck!