More: JackJack is a 4 month old pittie mix of some sort rescued from Juarez Mexico now living his best life in Texas. Unfortunately JackJack was born a little different, missing an entire shoulder joint, and had to have an amputation. His owners work for the dog rescue that saved him, as well as own horses. JackJack is the best barn dog we’ve ever seen! We’re so proud to own such a strong dog.