Oh gosh, this is a real concern since he's wanting to eat/drink, but isn't/can't
. I know soooo many elderly dogs who've almost no teeth at all and/or their tongue hangs out - and they can still eat/drink.
So, I can't help but wonder if he has more teeth that are really very bad - and causing bad pain, which is preventing him from eating/drinking.
Have all his teeth been looked over again...?