As pig production continued to increase in the past, the need for regrouping pigs to maximize space efficiency became necessary. Studies show that the larger the group of pigs, the less fighting that occurs. This will lead to better carcass quality. An initial reduction in growth rate in large pens should not be worried about because it will balance out at the end. A shift in the dunging area should not be confused with poor ventilation. Health checking in large pens involves getting in amongst the pigs and walking in a set pattern to observe. Weighing and sorting can be a challenge, which is why some producers elect to weigh and sort in small groups at a time and/or in a designated area. Auto sort systems have the potential to be efficient but reports have been variable. There should be adequate feeder space for the stage of production required and the pig’s first trip through the feeder should be pleasant and stress-free. With good management practices auto sort feeders can be very good for successful sorting and weighing of large groups of pigs.