Browse Checker jobs on OK Jobs or publish job offer. Open positions, vacancies posted by leading employers1) Counts and herds cattle, hogs, or sheep as they are unloaded from shipping trucks in stockyard and verifies information on ticket, such as number of head, identifying markings on livestock, and designated commission agency: Marks time of arrival on ticket and gives it to shipper as receipt. 2) Herds livestock into separate pens according to markings which identify commission agency to which stock is assigned. 3) May mark identification on stock, using shears or chalk.Source: https://www.wikipedia.org/