Thank you all for your thoughts and concern, my dad is doing much better now. When I talked to him last night, he sounded very chipper and back to his normal self. Basically, they sent him home yesterday because all the tests didn't reveal the source of his blockage. I thought they'd poked and prodded all possible orifices, but apparently he'll have to return in a couple weeks for more tests.
Sure is hard to be reminded my parents are getting older... and older... and older.
Sure is hard to be reminded my parents are getting older... and older... and older.