IKEA Kallax expedit DIY cage for my guinea pigs and hedgehog. It is 17.1 sqft total for three levels; which is larger than the suggested minimum size for 4 cavies. Mine can run full tilt and love to do laps up and down the levels; this dispels the idea that each level is too "small" because they can't run. It's still bigger than a 2x6 C&C cage and all the same natural behaviors are exhibited.
Guinea Pig Cage from an old book shelf
GREAT rat cage idea!! Boy do I wish I had a bigger house so I could give my rats a bigger house ! Come on lottery...ratties need a bigger house !:
Guinea Pig Enclosure with side loft
Piggies new home - Guinea Pig Cage Photos, for the less handy, buy a shelving unit and attach a ridge and plexiglass
Synchronized snacking! Wish we had space and money for a dozen piggies.