The first place, even before feeding, is occupied by comfortcows. Since it is the self-feeling ofcows that affects, from its side, the acceptance andassimilation of feed. Cows, lying down at rest, chew intensively, and at the same time saliva is secreted, which contributes to the neutralization of the acid fermented in the rumen. At this time, the cows release the movement apparatus, which is very overtired on the concrete. The process of hoof drying is in progress. Also, the blood supply to the udder increases - by approximately 1 l/minute compared to the standing position, which favorably affects the process of milk synthesis. Therefore, to maintain high productivity, cows should spend 12-14 hours a day lying down on rest. The optimal behavior is when 80% of the cows of the herd, while resting in the cowshed, lie in boxes. More detailed information here http://molochka.com/rus/catalog/e/rezinovyue-pokryutiya-dlya-korovnikov.html