Sorry it took so long to get back to you ... I'm not on line as much as I use to be.
The one Debbie mentioned is a good one.
Mine is so old, they don't carry that model any more, but here's one you could check on:
http://www.allbrands.com/products/abp12532-0381.html (I also use it for cleaning the bathroom and kitchen areas.)
A small one like this is just fine, as long as you don't have very many cages.
I now use a commercial pressure washer outside for the main part of cleaning during the Spring, Summer and Fall ... in the winter I have to go back to my small steam cleaner (easy to use in the bathroom with the exhaust fan running).
Major cleaning is not that often needed, if you keep them fairly clean on a regular basis.
Jo Ann