A cattle and sheep herding robot is being tested by the Australian Centre for Field Robotics. While the current model is more likely to replace herding dogs than cowboys and shepherds, the next generation will have more advanced features. North American Hogs and Pigs Inventory According to USDA’s most recent quarterly Hogs and Pigs report, total U.S. and Canadian inventory is up 2 percent (see breakdown below).Additionally, the semi-annual pig crop for the U.S. and Canada totals 74.3 million head to date, up about 1 percent from last year, and sows farrowed total 7.04 million head, an increase of less than 1 percent. According to Ag-Canada, 503,126 feeder pigs and 100,750 slaughter hogs came into the U.S. from Canada through the end of Ma...