The Jack Chi is a hybrid between the Jack Russell Terrier and the Chihuahua. Erroneous Alias: Jackahuahua Country of Origin: Jack Chi's originate in the United States of America. Original Purpose: The Jack Chi is a great family companion. Breed Characteristics: Jack Chi's generally are affectionate, playful, and active. The Jack Chi tends to get along with the entire family and is eager to please. Jack Chi's need to be exercised often to control hyper ways. Life Expectancy: Average life expectancy for the Jack Chi is 10 - 13 years.