Amazon.com : EZWHELP EZCLASSIC Whelping Box for Dogs and Puppies - Indoor Dog Whelping Pen with Rails - Sanitary Dog Whelping Box - Puppy Playpen for Large or Small Puppies - Whelping
Amazon.com : Artemis Whelping Box for Dogs and Puppies - Large Birthing Supplies - Plastic Panel for Puppy Safety-Washable Kit with Liner-Birth -Containment Birthing and Playpen Boxes (Standard 40" X 40", White) :
Large Whelping Box with Play pen 2.3 m x 1.15m x .48 – Madee's Pet Supplies