Correct, but will it hurt them to be housed in something bigger? The deal is I have no idea what I plan on getting in the future (sex wise). I would assume at least 1 male, 2 females and go from there .. but I want to future proof my purchases for as long as possible. I like that these can be stacked, and I like the way the heating is done .. I dunno.
I do only have a young male ATM, but that WILL change and I want to be ready for that. The baby rack can wait until .. ya know, i have babies. When I get more adults (males and females) I was just planning on getting them into the correct sized racks then ... but for now, wouldn't this work for a starter?
* young male is about 8 months old.