You have my sympathy. I have never faced this terrible disease and hope I never have to do so.
My best suggestion is to live like a dog--in the moment and enjoying each and every second without worrying about the future.
Best of luck you and your family,
Linus van Pelt Haus Juris. My Sweet Babboo, born March 17, 2014.
Madeline Ronan Heart (Maddie) Dec 1997 -- November 22, 2013 Rescue GSD, Sable