Ancillary K9 is a company that offers dog training solutions in Arvada. The company's programs provide a professional training collar and work on on-leash commands, nuisance behavior reduction, and one-to-one lessons. Some programs also involve off-leash commands, as well as dog and human reactivity and aggression mitigation. Ancillary K9 trainers Dion Studinski and Tyler Hunter are members of the International Association of Canine Professionals. The business also accommodates training for personal protection dogs.