I'd love to help you but the question is not not clear to me. How do you get around what?
The issue of eating concerns me a little. You say he "needs" six meals a day. He says he's full. Let me explain what bothers me about that. It seems that somebody wants him to eat against his own desires. One of the major problems in ALS is that the PALS loses choices: they can't choose to walk, can't choose to enjoy anything. And now here's a family that is pushing to take away his choice in what to eat!
I strongly believe in giving a PALS whatever they want, with smiles. They may or may not live longer, but then you have to understand that they might or might NOT really want to live longer, stricken by ALS. Maybe they have no acceptable way of expressing their desires to their family.
Sometimes a family loves the PALS so much that they insist on taking care of the PALS, even when the PALS does not want it. I disagree, and let the PALS decide what their choices are.
If he doesn't want to eat, don't press the issue. He's a grown man of sound mind, and should control as much of his own life as he wants.