I was on a nasal feeding tube as well. It takes awhile to get the swallowing process down. Good advice above to have them evaluate the swallowing process and get more exercises to do. The fact that he can swallow his own saliva is a good sign. That is how I started as well. Then, tiny amounts of water over the feeding tube.

I am about 15 months post surgery and can swallow fairly normally now. But, it did take months and i had to judge my progress in weeks/months rather than days. Hope this helps. Keep us up to date and hoping for a full recovery for you guys.

Nels