The Universal Welded Wire Pen is powder coat for durability and comes complete to use as a standalone pen or as a free range cage you can easily move around your property. The Metal Pen comes with a knock-out panel so you can easily add our Wooden Hutch or Dog House. Simply remove the 4 bolts in the back panel and insert our Wooden Hutch or Dog House for a complete home for up to 12 chickens, small dogs, turtles, adult rabbits, cats, and baby goats.