I am looking for feedback on cat housing for an animal shelter environment. We currently use individual Shoreline stainless steel cages w/ approximately a 3x3 floor space. The litter box is a large sized paper food tray about 6"x4". The water bowl is a 4" stainless steel bowl. I have seen numerous configurations and ideas including open housing in cat rooms, cat condos and others. Our problem in a municipal environment is that we cannot afford to test for the various cat diseases so we could potentially mix cats with transmittable maladies. Any advice or suggestions would be welcome.