Jack was perhaps the smartest dog I ever had. He lived to be seventeen and a half years old. #dog #dogs #canine #canines #furbaby #furbabies #pet #pets #family #familymembers #familymember #dogpack #dogpacks #dogpackfamily #dogpackfamilies #dogfamily #dogfamilies #baby #babies #jackrussell #jackrussells #purebred #purebreds #tanandwhite #tiny #tenpounds #diminutive #small #littlebit