Unfortunately, pet stores are terrible resources for information on small animals. I don't know of a single "pet store" cage on the market right now that I would use as anything more than short-term housing for rabbits. If I'm thinking correctly of the one you have, does it have a red bottom? I think we used that same cage for our gerbils!
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry