Two ferrets were very cramped in one of these. Four rats might be a bit much. Plus, they could scratch the zippers open at either end - I hear ratties are smart enough to figure something like that out, as well. I clipped the zippers closed and it seemed to hold out, though. After a few months of using them occasionally in 2 hour increments, they had destroyed the plastic liner inside, but the carrier itself was still intact, since it's made of a pretty touch cloth. I'd be more worried about the waste/food/water situation for a whole 7 hours than I would about this cage not containing your rates.
answered 3 months ago
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