The grower/finisher phase represents the longest management period for market hogs. It is also the period of greatest feed consumption and greatest use of space. Often, when seeking to improve operations, this phase is overlooked. This paper discusses several aspects of grower/finisher facilities and how better knowledge of behaviour should improve the design and management of this phase of production. Areas to be discussed include considerations of the quantity and quality of space, social management of pigs and alternatives tot eh partially slatted confinement barn.