What age should a working cow horse prospect be started?

The age at which a working cow horse prospect should be started under saddle follows the same general guidelines as other western performance disciplines, with the specific demands of working cow horse training adding a few considerations about the timing of cattle introduction and the physical development required to handle the stops and turns that cattle work eventually demands. Most professional working cow horse trainers begin horses under saddle as two-year-olds, following the same gradual introduction to saddle, rider weight, and basic responsiveness that applies across western performance disciplines, with the three-year-old year being the primary development year in which the reining maneuvers are installed and cattle are introduced systematically. The growth plates in a horse's skeleton — particularly in the back, hips, and legs — continue developing into the third or fourth year of life, and the specific physical demands of sliding stops and hard fence turns place significant stress on these developing structures. This means that while basic under-saddle work and early reining training can begin at two, the full physical demands of advanced cattle work at speed are better suited to horses whose physical development is more complete, and programs that push three-year-olds into hard stops and fast fence turns before their structures are adequately developed risk creating physical problems that manifest as the horse enters what should be its prime competitive years. Early cattle exposure — for the purpose of assessing and nurturing natural instinct without hard physical demands — can happen at any age including before the horse is started under saddle, and many experienced trainers consider this early cattle exposure valuable precisely because it develops the instinct before systematic training has a chance to suppress the horse's natural expression of it.