From the cowboyshowcase.com website:
“A “cavvy” is a group of ranch horses. The word comes from the term “cavvietta,” derived from Spanish and referring to the whole herd of horses that a ranch owns. The cavvy of horses is gathered by the horse wrangler in the morning and walked to the “ropes” (a portable rope corral used to hold horses.) The “jigger boss” (second in command to the cow boss) or the cow boss ropes the horses from each buckaroo’s string as requested by the buckaroos for the day.
“One tool that was used extensively was what they called “cavvy marks.” These were marks made by trimming a section of the mane hair in a certain way to mark the training level of a horse. The cowboy way was often to travel from outfit to outfit and when the old jigger boss quit, the new one could more easily step into the job.
“To mark the horses, the section, about 6 inches long, of mane hair from the withers forward was “roached” (trimmed as close as possible) using scissors or clippers. This also keeps the mane hair from bunching under the saddle blanket or pad.
“Another use for cavvy marks is if the horses get mixed with a herd of wild mustangs, the cavvy marks can be seen from a distance and are a good identifying mark to help separate your saddle horse from the mustang herd……….
“Two tufts of mane hair indicate that the horse is a bridle horse, one tuft indicates a two-rein horse, and if the mane is clipped smooth on top of the withers, the horse is snaffle bit horse. ”
I know a couple of cowboys who regularly do this to the horses they train and I think it’s a great idea.