My first dachshund, Heidi, was afraid of the vacuum cleaner.
My mixed breed, probably part poodle, Friska, was very smart. She could get scared at weird noises. (My cat, Peter, was like this, too).
My second dachshund, Rosie, came to us thin and the victim of terrible abuse. She lived to be about eighteen, but she never got over it in all the time she lived with us.
My beagle, aptly named Begi, grew deaf in her old age. She was also very accident prone during her life, and was at the vet for all sorts of crazy reasons. She came to us when she was ten and lived to be 17.