I have nethies and I also have double four foot hutches, however, each four foot hutch has a significant area to run in outside of the hutch (Somewhere roughly around the 30sqft mark). A four foot hutch, or a double four foot hutch is NOT ok for a nethie(or any rabbit for that matter). However, it can be a good base as long as the rabbits have permanent access to a run/area that is weather proofed too (the amount of space depends on how much needs to be weather proofed).