If you're considering adding a rabbit to your brood, check out some of the things I've learned from my 5 month old bunny, Cole. Also check online for good sites and advice. Happy bunny trails!
Some facts on rabbits that I've learned: Males are called bucks, females are does. Their teeth never stop growing, so it's important to have a chewing log (available at pet stores), veggies (check online for good lists of good and bad foods), and hay available to them to keep their teeth worn down a bit. They generally do not bite. As Cole has gotten older, I've had to trim his nails (a regular nail clipper is fine), which I actually hate doing. Their nails are like ours, with the longer part able to be clipped, but also needing to be careful of the quick/nailbed. They're also fuzzy around their nails, so get your bunny calm in your lap, (wear pants so bunny doesn't inadvertantly scratch you), and have bright lighting so you can clearly see where the quick of the nail is and aviod it. This needs to be done about every three weeks. Bunnies need a constant water supply, as they drink a lot to aid in digestion. They also need a lot of fiber in their diet, so make sure to give them their pellet food, but also hay. Timothy Hay is best from what I've read. Some fruits and veggies are great for snacks and can be given every day, but check online to see a complete list. Some foods will upset their system. If you would like your bunny to have some running area outside of it's cage, consider getting a small dog or ferret harness. A simple collar-leash will not hold the rabbit appropriately and they'll often struggle away from it. The harness has two collar-like clips: one that goes around the neck and another that wraps around it's belly. Make sure the belly clip is tight enough or as they run, their arms can get caught and stuck. It may look tight, but if you can fit a finger or two underneath comfortably, it's correct. Also be sure to be present whenever the bunny is out of it's cage, as they love to sniff, but also chew, on everything. Watch out for cords for lamps, etc., as well as any furniture you don't want to have scratched and chewed. Oh, and the carpet too, haha.
It's difficult to determine the gender when they're very young but if you're comfortabe enough (and your bunny won't kick you in the head), you can manually check things out. Again check online resources for more information. Otherwise, around 3-5 months you'll know what you're dealing with. Rabbits live between 7-10 years. If you're not planning on breeding, you should definitely get both bucks and does "fixed". I think you can do this between 6-12 months old, but your vet will know what's best for your bunny. Getting the rabbit sterilized helps them be more calm, obedient and is also better for their health in the long run. Females especially are at risk for reproductive cancers if they're not bred, and sometimes, even if they are. Males are also at risk for cancers later in life, so get them fixed when they're young. Rabbits can be potty-trained and Cole has actually gotten the hang of using the plastic corner-box in his cage. When you change the cage (weekly or bi-weekly), put fresh bedding down and in the potty box. If you put just a little bit of the discarded, "wet" bedding in, the bunny will sniff it out and want to mark his spot on it. After a while, they get the hang of it. I haven't had too many accidents, although I did realize that I can't leave Cole out on his harness for more than 2 or 3 hours. They need a lot of water and are only so big, so put them back in their cage to use the potty, eat, and also feel safe again.
Feeling secure is extremely important to rabbits. They're naturally prey animals, so their instincts are acutely aware of any new noises, even outside with doors and windows closed. I sat with Cole last night and while everything was closed, he still heard the frogs and was alert. They will look to you, their safe person, to assure them they're okay. TV and music noises will perk them, so be careful not to make it too loud. I've noticed Cole sitting stick-still when a new noise happens and he looks at me. (Usually this is a sideways look, as he's using his other eye to watch for any potential danger elsewhere.) I make sure to use a calm voice and just tell him what that noise was, kind of like you would for a small child. Then he relaxes and goes back to his bunny ways. I read that bunnies are basically like forever 2 year olds, always curious, needing attention and physical holding, and even sometimes mischevious. So love your bunny a lot, give it boundries and be consistent. Cole tests me like a two-year old, but I have to be patient. When he's just being defiant or gets tangled I have to be a bit more firm with him. Usually a firm, "No" will stop him. He has learned and knows his limits much better. (He's not chewing the carpet anymore, haha.) Bonus: Bunnies are quiet! While they can scream if they're extremely scared or excited, they generally are very quiet and make just the smallest squeaking noises sometimes. Unless their in their cage and running around or playing. Overall I'm very happy to finally have my snuggly, fuzzy animal I've always hoped for.