The needs of stock and crops are not necessarily the same in time and space. The greatest single contribution to total shelter is the configuration of the land itself (geomorphic shelter) while the contribution of other topographic shelter such as heather, low bushes, even rushes, walls, hedges, and buildings is considerable. Forest shelter should be thought of as added shelter and related to the distribution of exposure risks over the farm as a whole. Its value may be greatest, provided space can be allotted, where stock has to be concentrated at critical times and cannot therefore make use of geomorphic shelter. We have still much to learn about the nature of plant and animal responses to exposure risks and the shelter needs of a particular area or farm must be assessed from a case study involving exposure risks, existing shelter, and husbandry methods obtaining or proposed, before any scheme is undertaken to provide added forest shelter.