A pair works very well joined together
As been noted by others, this cage is a little big/awkward to move around to serve as a carrier and not large enough to be two cavys permanent home. However, I bought 2 cages, (post free) and use them together to make a more interesting and spacious living space, whilst retaining the flexibility of being able to separate them if required. It also works-out as more cost-effective than choosing a larger single cage. Only requires a small shelf and snipping of 4 bars for cavy access between them