Another toy dog, the Maltese is an ancient breed that is highly popular. They usually weigh under 8 pounds and rarely reach heights of 1 foot. They normally have silky white coats, although sometimes have curls. Seniors will love these tiny dogs because they are famously affectionate. Maltese love humans and thrive inside or in houses with small yards. Therefore, a Maltese is a perfect dog for a senior who wants a loving companion without excessive exercise requirements.