Hi, my son almost 16 is getting either a g or gj tube soon. The gi says he will need to be on it 24 hrs a day. I am wondering if this will affect his appetite since he does eat orally also. I was also wondering from parents whose child does this type of feeding, how heavy is the feeding pump that he will wear in a back pack? I am only questioning this because he has autism and I know this will be a big adjustment for him because of his sensory issues. I want this to be as easy of a transition as possible for him. Thanks, Janelle