One night he was resting then suddenly woke up, and watched something in the room, and his eyes followed whatever-it-was. His tail wagged, he made
greeting noises, his nose was wet and his eyes shone, and he looked about 2 years old (He was 14) He looked so healthy and happy suddenly.
He died 2 days later.
I will always feel that he was greeting someone who came to help him leave this world.
Dogs are very sensitive to spirits, and influences from the other side.