Toy dog breeds are very small dogs known for their compact size, companionable nature, and outsized personalities. Typically weighing under 15 pounds, these breeds were developed primarily as companion dogs rather than working or hunting animals. Despite their size, toy dogs vary widely in temperament, energy level, and care needs—from calm lap dogs to lively, alert companions. Popular with apartment dwellers and city owners, toy dog breeds are valued for their adaptability, close bond with humans, and suitability for indoor living.