Our 14 year old Rottweiler-Boxer "Orion" is steadily going downhill as well - there's not too many months left for her. One day she looks better - the next day she looks horrible. We're right there with you, my friend - can't stand to see her going downhill and suffering, but too attached to make the "decision".

God speed - Denali will be right there waiting for you, staking out a nice place for her people!