The closest wild relative to the chihuahua is the Mexican wolf (also known as the "lobo"). However, Mexican wolves are much larger than chihuahuas and have a distinct appearance.
Are there chihuahuas in the wild?
No, there are no chihuahuas in the wild. Chihuahuas are a domesticated breed of dog, meaning they were bred and selectively chosen by humans over many generations for specific traits. They don't exist naturally in the wild.