As the disease progresses, the dog may or may not experience seizures, or stroke. Several people report that when their dogs
have died from this, prior to dying, the dogs vomiting
is almost continuous. There is also the possibility that the dog may slip into a coma, and die in his sleep.
Sadly, if the dog is not eating or drinking, and is indeed in the later stages of the Disease, there is not much that can be done for him.
Please let us know how he is doing.
My heart goes out to you.