Lately there has been interest in increasing the pen size of nursery pigs (from about 22 to 50 – 150 pigs). Ideas for a large pen design include a fully slatted floor, feeders along the length of the room and centre, and 4 pens per room. Feeders are one of the most limiting factors in this design (there MUST be adequate access to enough feeders). The advantages to large group sizes include cost, extra space utilization, savings in labour cost, less moving and mixing, and more forgiving in regards to crowding. Some of the disadvantages include difficulty in handling and age and health. To get this system up and running, 20% more feeders and drinkers, hospital pens, an alley, 80 per pen, and adequate space are all recommended.