"I purchased this pen for my 5lb Maltese, I thought it would be perfect for her to play in while I was busy or gone away. Within 1 week she had chewed a hole big enough to get out, to my surprise.
Well, I bought some heavy cardboard from Home Depot, had four pieces cut to put on each end of the pen, and it works good so far, just too bad the wire mesh was not chew proof, if you have a dog that chews, just be aware that if you leave home, she or he may be out running around when you return."