In spring of 1990, Doc O Mos, then a 6 year old bay 15.1 1/2 hand stallion, was discovered as the finest "Pleasure prospect" in the country. Previously a Working Cow Horse and never trained for Western Pleasure, Doc O Mos went under the guidance of Mike Moser and earned his titles of 1990 Senior Western Pleasure World Champion, Senior Western Pleasure Congress Champion, as well as Congress Western Pleasure Maturity Champion, all in the same year.

After his brief show career, Doc O Mos came to Double K Ranch and was retired to breeding. Beginning with his first foal crop, Doc O Mos became a leading Pleasure futurity winner sire. However, wins in Pleasure classes are only a small part of his offspring's accomplishments. More than anything else, his offspring are very versatile show horses. Their great mind, balance, movement, athletic ability, and trainability, create true all-arounders for the open, amateur, and youth rider. For the 1999 and 2000 show season, Doc O Mos was a top 10 leading AQHA sire of Most Performance Register of Merit horses.

Doc O Mos' success in the show ring and versatility as a sire is no accident. His sire, Reined Cow Horse World Champion Doc's Malbec (a sire of World Champions in Working Cow Horse, Reining and Western Pleasure) is by Doc Bar and out of Isla Tivio (an AQHA Champion by Poco Tivio). The Doc Bar x Poco Tivio cross became known as the magic cross that produced many of the finest show and breeding horses in AQHA history. Doc O Mos' dam, shown in Halter and Cutting and a futurity winner of over $8,000, is three-times King bred. She is by Thermo Sock, an AQHA Champion himself and a Reserve World Champion sire.