This portable wire pen is easy to setup and folds flat for storage or travel. (bestdogcrate.com)
So close, that one good - size turtle — wider than a dinner plate — couldn't turn around in its tank and the rabbits confined in wire pens could not move at all. (scientificamerican.com)
Without food or water, the animals were malnourished, dehydrated and were restricted to only small wire pens and shacks. (waysidewaifs.org)