If the animals are on a Covered Wintering Pad/Shelter they can be in 3 places:
1) on the concrete feeding apron (commonly known as feeding row);
2) on the sleeping/lying part of the pad;
3) grazing pasture
When allocating the time, Hours on Structure Per Day includes Time on Apron. Therefore, Hours on Structure Per Day plus Hours Grazing per Day must equal 24 hours.