This paper discusses the two most common methods of managing sows in groups, using electronic sow feeders (ESF) and using floor feeding. Other methods using free access stalls, cafeteria system, and biofixation feeding stalls are explored in less detail. Our objective is to assemble a review on each type of housing so that pork producers considering a change will know what challenges await them, and how others have solved problems to achieve excellent results. Electronic sow feeders are a proven method of loose housing of sows, which has been under development over the last twenty plus years, mainly in Europe. It provides a substantial improvement in welfare to the sows under good management, if management pays attention to the details. Productivity figures can be equal to or better than those of stalled units. The system, however, is more labour intensive, and is reliant on complex electronic and mechanical parts, which need to be well protected against a hostile environment, mice in particular. Special care should be taken in choosing an equipment supplier who has adequate technical back up, and spare parts availability. Group pens for housing dry sows have been far less popular than stalls for the past 30 years. However, there have been a number of producers who have used group pens more successfully, than the early experiences in the 60’s and 70’s. There are a number of layouts that can be considered as shown in the several diagrams in this paper. As more producers consider group housing, there will be a lot of consideration given to modifying existing stall barns because it may be possible to modify it economically. The major challenges will be in the details of the existing solid floor as to whether it can easily be smoothed out and the suitability of the slats that are presently in place. The two most popular options, their strengths /weaknesses and the design alterations to improve best management practices have been described in this paper. In addition, the other systems introduced at the beginning would offer additional options, these may be found on the website www.VIDO.org, just following the links to ‘information for producers’.