We are hobby breeders of Australian Shepherds and needed a sturdy containment area for the puppies once they reached the stage of climbing out of the whelping box. Puppies are raised indoors and this pen allows for a crate, a private area for their elimination needs, and plenty of play area. It also allows them to get acquainted with sights and sounds of our house. I rate this product four stars as when it arrived a couple of welds in the fence were broken. It is good looking, easy to assemble and has been tested and approved by nine puppies!