I'll add more later, when I have time.
I've been raising rabbits in family colonies for years, outside in all-wire pens with tarp roofs. A solar powered electronet fence from Premier has kept them safe - no losses. I've had this particular set-up for about 4 years. The pens measure 4 feet by 8 feet, and are tall enough, with the pitched roof for me to stand in. Pens have wire floors to prevent digging.
I do NOT just stick random rabbits together. I use one bonded male/female pair per pen. The breed is Champagne d'Argent. Never had an issue with the buck of this breed turning agressive on young kits. My does almost always give me 8 or 9 healthy kits. Kits are removed for butchering before or at the point of sexual maturity (very important). I usually have a pack of juveniles running around, and a younger litter of kits in the nest. I make wooden boxes for shelter, climbing, privacy, and nesting. The pens get quiet crouded with all the young rabbits, but everyone always seems contented and healthy. They are fun to watch. I go in everyday and pet them while feeding, so they are not hard to catch when it comes time to butcher.
Besides pellets, I feed lots of weeds, and all the hay the goats waste. This surplus vegetation gets scattered around the floor, making deep litter system. Thus, the floor of the pen is always fresh. About once a month I clean the pens and toss the partially composted hay layers to the chickens. This material is full of bugs, and the chickens appreciate the snack.