• Talk about a brood cow producer, Mr. JS 373, is a big boned, heavy muscled bull that excels in overall capacity and fleshing ability. 373 is a long sided bull that is thick over his top and down through his quarter. 373 is already making his mark on Smith Brahmans cow herd by producing some extremely broody, functional females. 373 is sired by JJ 691 and is out of " The Herd Bull Producer", JNL 131. Breed Mr. JS 373, the future of your cow herd depends on it.