When I got my son's guinea pig "Penny" we bought the store bought cage. Of course after research we upgraded to the Midwest guinea pig habitat. But then we had this smaller cage, so I decided to attach the smaller cage to the Midwest habitat and use a ramp. I used zipties to keep them together. Now the old cage is the kitchen area and the midwest is the Living area. "Penny and Amy" seem to like all the extra room. What do you all think?