Oh ok, sorry I assumed bunny was an outside bunny, as in my country I have yet to see an indoor bunny, we get rather hot here too and humid, I was a diligent owner alway's making sure bunny was in the shade or shifting her cage around all day long, it was on castor wheels, but then not everyone is, so if you want an indoor cage , perhaps they are not quite as suitable,maybe you could adapt them a little to suit indoors, good luck, search the net, you will come up with many ideas for sure.