Go to your local Walmart or Kmart and buy a plastic tote big enogh for your dog to fit both long and side, and cut a door on the longer side..
they LOVE the cave effect and you can remove the top and access your girl if need be..my girls LOVE IT..
this are a few pictures of my two setups for my girls, one is bigger then i realized I did not need that much bigger so I went down in size,
i paid about $11.00 for the bigger box and about $7.00 for the smaller grey one, that is the one I am currently using..use sand paper of a dremmel tool to soften the edges.
http://i126.photobucket.com/albums/p...cture004-4.jpg http://i126.photobucket.com/albums/p...3/IMG_0307.jpg http://i126.photobucket.com/albums/p...3/IMG_0331.jpg