Hi and welcome to NeuroTalk! I found this info on the Mayo Clinic website.....it may be of some help to you:
http://www.mayoclinic.com/health/dif...SECTION=causes
Seems to me they'd try and find the
cause of the problem instead of suggesting a feeding tube right off the bat. He may need one temporarily until they can pinpoint the cause of his problem.
Your Dad's fortunate to have you as his advocate.