@matigo My parents had a dog (Kelpie/Golden Cocker spaniel cross) which by the age of 14 years was profoundly deaf & mostly blind, but managed to get by with her sense of smell. Had to be put down eventually. My sister had another from the same litter, it was a male & twice the other dog's size. It also went deaf & blind and went missing from Mum's place overnight about 18 months ago. It was found dead on the adjacent highway where it had come off second best against a truck it was neither able to see or hear.