30. In this system, birds are kept on a single level of litter usually consisting of such materials as wood shavings, saw dust, chopped paper, straw, peat or sand. It is unusual for perches to be provided, except for nest box alighting rails. Feeders and drinkers, either mounted on stands on the floor or suspended from the roof, may serve as perching space.
31. The maximum stocking density allowed under the EC Egg Marketing Regulations is 7 birds/mē and at this density management to maintain litter in a friable condition can be difficult in winter. In the UK, few laying hens are now kept on true deep litter systems except for breeding stock.