At a glanceA handler’s post identifies a position within a trial course. The rules determine when the handler may leave it.WORKING DOG reference library · Added 2026-10-19 · Editorial guideA marker with a course meaningWhen a spectator hears at the post, first identify the competition and course layout. A visible post might mark the handler’s position, another obstacle or a boundary. Do not assume that every marker in a field has the same purpose. A labelled diagram helps explain the actual task without requiring the viewer to guess.An example of an incomplete clipImagine a video beginning with sheep near a handler and ending as the person moves towards a pen. Whether leaving that position was permitted depends on the course stage and authority. The clip alone may omit the relevant transition. Preserve what was visible rather than announcing an official fault from an unfamiliar rule system.Record the frameworkFor instructional material, keep the course authority and rules edition with the diagram. For an individual result, use the judge’s recorded assessment instead of constructing a deduction from a general glossary. A spectator should also avoid walking near course markers or entering the field to improve a camera angle while a run is underway.Sources & further readingReferences for this guide. Rules and services can change; check the responsible organisation for current details.International Sheep Dog Society — current trial rules (opens in a new tab)Keep exploringFetch in sheepdog work ↗ISDS National trials: four national pathways and their records ↗Explore the working dog communityRecorded competition results · Find a trainer · Browse services · Dogs & litters