Hello! My 9 month old son has been eating stg 2 baby food for awhile now and loves it. I have been trying stg 3 baby food, puffs, or tiny pieces of bread but every time I give it to him he constantly gags until he throws up. I have even tried thicker pureed foods with more texture but without lumps and he gags. However, he constantly acts like he wants to eat the food...he is always grabbing it and smacking his mouth when we are eating. Ideas?