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.
Hours grazing also include the time allowed for milking time and lane time, only while the herd is lactating.