9. Welsh Terrier
This medium-sized tan and black breed is a true terrier. As it was bred for hunting, this dog is full of energy and has an independent spirit. They will generally weigh around 20 pounds. What makes this breed great for seniors is its playfulness, energy, and spirit. While it may not be ideal for less able seniors, this dog requires a great deal of exercise, which can help a person to stay in shape. In addition, they are very playful and lively, making them great dogs for playing with grandchildren.