I made my own ex-pen when we first got Tika. So I though I would share this with you. It can be made very quickly. I did not want a metal one to scratch up the laminate flooring. I also wanted one that was portable. granted it doesn't currently have a door but I bet it would not be hard to figure out how to add one. It is made out of white vinyl lattice and zip-ties, both very inexpensive. The lattice cuts easily with a hack saw, the holes for the zip-ties were made with a cordless drill. The panels can be cut as short or long and as few or many panels you need to make what ever size or shape you want. It is very versatile. It folds up nicely and can be scrubbed down if needed and wont rust. If you only have carpeted area you could by a scrap piece of linoleum, cut it slightly bigger than the pen, put a few holes in it and zip tie it to the lattice and have a perfect potty training area.
The only problem we had with this was that our smart little Tika learned how to push it over to the stairs, leading down, got just enough of the corner over the top step to perform her Houdini escape tick,
so we put a chair in her path and fixed that. So all in all it has been and excellent thing for us, especially when she was in her little puppy stage. Now that Tika is older and potty trained I dont use it as often inside. I included pictures.
Potty training, we slowly eliminated the pads one at a time until she was more reliable.
great for camping.
We found a small tarp to go under half and around to half way across the top, this provided shade and kept her off the damp grass. She slept in the tent with us though at night.