My son was diagnosed with GDD autism not ruled out. Won't eat anything except chips and crackers which are all gluten free. He thrives on his gluten free casein free milk. We are on our 2month since we started him on his GFCF diet. I hope to receive advice and suggestions how to get him to eat regular food. He has his once a day occupational therapy. so far still no clear words spoken and still mouths everything he helds. Getting very worried. What should i do?