The Toy Fox Terrier is a small, agile dog breed known for its intelligence and lively personality. It typically weighs between 3.5 to 7 pounds and stands about 8.5 to 11.5 inches tall. This breed is characterized by its smooth, short coat, predominantly white with black, tan, or chocolate markings. Toy Fox Terriers are known for their energy, alertness, and loyalty, making them excellent companions. They adapt well to various living environments, including small apartments, as long as they receive adequate exercise.

The Toy Fox Terrier is a breed developed in the United States and does not have a 'native' wild region as it is a domesticated breed. It was bred primarily as a companion and small game hunting dog.

As a domesticated breed, the Toy Fox Terrier thrives in human environments, including urban, suburban, and rural settings. They are adaptable to various living conditions but prefer environments where they can be close to their human companions.

The Toy Fox Terrier's ecological niche is not applicable in the wild as they are a domesticated breed. They serve as companions and are known for their agility, intelligence, and ability to participate in activities such as flyball and agility sports. Historically, they also served as effective rodent hunters.