I have 14 cats who have their own room (playground) complete with a/c and a kitty door to a fully enclosed porch just for their pleasure. They made the trip in an RV from MD to NM and this product I'm sure is what made it possible.
http://www.drsfostersmith.com/produc...fm?pcatid=1061
Yes my kids call me the crazy cat lady but sitting in the kitty room reading a good book is one of the best parts of my day. The cats seem to like it too. :-)