We've learned a few things in the last month:
Number one, bunnies that are still rather small CAN and WILL get pregnant. Oops.
Number two, male bunnies will eat little tiny baby bunnies. BIG oops. Maybe that lesson should have been in the "number one" section, and the "number one" lesson should be moved to "number two." I am not really sure, there, since both lessons happened simultaneously.
Those two lessons learned, we promptly examined the other bunnies in our possession and discovered a second pregnant female. We immediately removed her from the pen with the others and brought her inside, where she remained for a few weeks in her own private cage in the pantry. During those first two weeks, I began to second guess myself. Perhaps this beautiful gray bunny was not pregnant, just obese. It is possible for a bunny to get fat, isn't it? Day after day passed, and still no babies. Then one night, this beautiful gray bunny began to act so strange. She was losing her downy "under-fur" and every time we would peek in on her, she had strips of newspaper sticking out of both sides of her mouth. What on earth was she doing? Not only is she fat, but she's losing her mind, too? Great. A psychotic rabbit. Just what I need. The next morning we peeked in on her and discovered that this nest-like mound in the corner of her cage was... squirming... BABIES! I was so grateful... She was not fat, and she was not crazy.
The babies are now a couple weeks old and have made the move back outside. Batman revamped the pen, creating five little cubbyholes, one for each bunny, with the middle cubby housing mommy and babies.
This was their last morning indoors. They looked quite comfortable lounging on the love seat, and I was greatly tempted to go buy a litter box, pick my favorite baby, and keep it indoors. Batman swiftly told me NO. Spoilsport. Ah well.... The babies and "grownups" can be visited outside, I suppose.