16. Lhasa Apso
Originating from Tibet and being trained to act as watch dogs in Buddhist temples, the Lhasa Apso is an alert and attentive dog with dense, straight coats. They generally weigh around 15 pounds, and have only modest exercise requirements. This dog is perfect for seniors because of its alertness and strong sense of loyalty. Although it can take time to develop a bond, Lhasa Apso dogs are loyal companions for their owners. Further, they have one of the longest life spans, with some living into their 20s.