The term 'Toy Dog' can refer to a variety of small breeds of dogs, such as the Poodle, Maltese, Pekingese, and Toy Poodle. The Poodle is a breed of dog that is known for its intelligence and curly coat. The Maltese is a small, white breed of dog that is known for its gentle nature and long, silky coat. The Pekingese is a small, long-haired breed of dog that originated in China. The Toy Poodle is a smaller version of the standard Poodle, and is known for its intelligence and loyalty. All of these breeds are considered toy dogs due to their small size and friendly nature.