Here in DE, it is illegal to keep wild bunnies as pets, or to in any way restrain them in a hutch, pen, or enclosure - as it should be. They are meant to run wild and free, and I'm sure they are actually much safer and happier that way. It's even illegal to attempt to raise a wild orphaned bunny, and you are supposed to call the state wildlife office and have them picked up for the experts to raise. However, I have raised a few on a couple of separate occasions, and then set them free when they were old enough to fend for themselves. It's not easy - sometimes you succeed, and sometimes you don't.
There's a BIG difference between wild and domesticated rabbits. You should let this little one go on it's way at will, and definitely don't keep it restrained in any way.
Here's a few of pics of my last babies from a few years ago.
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