I just got off the phone with my Nana. She sounds really good, so I am much relieved. Apparently she was having trouble swallowing anything without a whole lot of pain. Her doctor was right on top of things though and even gave her his cell phone number (yay, good doctors!) and she's improved a great deal.
She said she's still being careful taking small bites and chewing a lot, but she is able to eat. Yay!
She's been drinking Boost, which is one of those nutrition beverages like Ensure. Only one a day - half in the morning and half in the afternoon. I told her to be sure not to hit it too hard or anything, which made her laugh. :P I think I may tell Mom to take her the tackiest shot glass she can buy in the Vegas airport.
So, good news for the hard-core 87 year old! Thanks for all the good wishes, everyone!