I have a three year old grandson that will not try different foods. He closes up and start shaking and get nervous and starts screaming, just putting foods in front of him. He will not even try it or touch it. He eats some healthy things, but will not try new foods he closes up. He eats lots of yogart, peanut butter sandwiches, bananas sometimes, loves muffins more than cookies and oatmeal. His peditrician put him on Breakfast Essentials in the morning for protein . He can not drink Ensure (Soy Milk) He has lots of energy, just want eat. What can we do? Do we need to see someone about this.