Nords, do you let Mr. or Ms. Bunny just wander around the house? Or does he/she live in a cage in the house?
"Peter Cottontail" (hey, our kid was only eight years old when she named him) is a four-pound dwarf orange rex, about 18" long. We got him from the Hawaii Humane Society, who found him roaming the streets of Waimanalo. He's not very well socialized (probably raised in a hutch without a lot of human/bunny contact) but he responds very well to spouse and was perhaps raised by a woman. We think he was an Easter bunny in 2001 because he was just shy of full growth when we got him in January 2002. Wild bunnies have lifespans of 4-6 years (predators), most captive caged bunnies go 8-10 years (arthritis), and "free range" captive bunnies can go 14 years before cardiac arrest gets them.
He (well, technically a gelding) has the run of a 15'x26' carpeted familyroom, which he's pretty much [-]chewed to pieces[/-] remodeled to his satisfaction. We've given him old cardboard boxes which he's pulled behind a sectional sofa to make his own bunny cave. He also has the run of a 10'x15' tiled diningroom but he can't get a grip on the tile with his toenails & fuzzy feet, so he has trouble accelerating/turning and doesn't like to get caught there by surprise. But bunnies cool themselves by panting like dogs, and the tile is a very cool place to lie on during hot summer days. He also thinks the diningroom drywall/molding is especially yummy.
We occasionally open a pocket door between the diningroom and the (carpeted) 10'x15' study to give him run time in there, but when we're done in the study then he leaves too. Too much tempting yummy wood in there.
He can hypothetically move from the diningroom to the (tiled) kitchen, which he does every few months, but he finds the refrigerator scary and won't go near it. He has to be really really curious (or lonely) to brave the kitchen crossing.
We used to keep him in a cage when we were working/at school, let him run around the familyroom when we were home, and then cage him for the night. That required a lot of chasing & handling, and nobody was happy with either side of that deal. Bunnies give out danger signals by thumping their hind feet, and when he did that at night in his cage (hearing or smelling the neighborhood cats outside the house) he'd wake us all up. About a year after we got him we experimented with leaving his cage door open and giving him a ramp to come & go as he wanted. He gradually moved out of the cage to his hidey-hole behind the familyroom sofa and hasn't gone back to his cage in years.
We have a pet fence across the diningroom arch to the livingroom and we keep the study door closed. Everyone enters the familyroom through the kitchen, and at night we put a pet fence across the kitchen arch to the livingroom too. (He used to chew through those too until we found one that was yucky.) Once or twice a year he'll go through the kitchen to the rest of the house, but we usually figure it out when he comes looking for us.
Oddly enough he never tries to chew through the familyroom screen door to the outside. He must think it's there to keep out the predators.
Most of his diet is protein pellets & timothy hay. He gets broccoli leaves a few times a week, and he likes an occasional chunk of papaya. When I'm done with a green tea bag (no strings or staples) he'll eat the whole thing. Tiny grapes & raisins are popular once or twice a month. But he'll practically moonwalk and do backflips for a pea-sized piece of ripe banana. Fructose is bad for bunny digestion, though, so it has to be minimal.
Bunny front teeth grow for their entire lives, so they have to chew to wear them down. Unfortunately drywall is very yummy, but we give him scrap pieces to work on. Pine molding is choice too. He also loves pieces of aspen or bougainvillea. Luckily he's pretty happy with palm branches and cardboard, and we give him plenty to work with...
Bunnies have a whole communication system, their body language can let you know exactly how they're feeling, and they really have unique personalities. They're great pets. But when he's gone to his great reward then I don't think we'll repeat the experience.