Why is my sons new rabbit biting

We just got our son a rabbit for his birthday. Occasionally the rabbit will take little nibbles of my son's arm. She hasn't broke through his skin.yet.

How do we stop her from doing this?

Also, which are more affectionate? Males or females?

Thanks. :)

I would suggest going to the House Rabbit Society's website to read up on Bunny Behavior. They have some really great information on rabbit behavior in general, and have a troubleshooting guide to help deal with unwanted behavior. How old is the bunny, and did you get her from a petshop, a shelter, or a breeder? Different breeds have different temperaments (some will nibble more than others, some will scratch more than others). Sometimes, it can be a problem with the teeth--for some younger bunnies, the teeth can get in the way of their tongues sometimes, so while she meant to lick, she might accidently nibble instead. She could be trying to tell you that she needs more minerals (human skin is very salty in taste, so if an animal is constantly licking or nibbling, it can be helpful to add extra minerals to see if it cuts down on the behavior)--while I do not recommend salt licks (salt wheels, etc.), I do recommend mineral wheels (usually sold right next to the salt licks (white), the mineral wheels are usually a brown or green color. You can also get mineral treats (there are all kinds of different ones out there--they will say that they are mineral treats though) to put in her cage--not only will these give her more minerals, but a lot of them also serve as toys to keep bunnies entertained (a very important thing for bunnies!). When ever I get a new bunny, I put him/her in the cage that I have ready and waiting, fill the food and water dishes, and leave them alone for the first 3 days--I don't touch them, I don't take them out of the cage, nothing. The only thing I do is sit next to the cage and talk to them, usually while holding my hand against the cage bars. This gives them a chance to get used to the new surroundings and to my voice. It also gives them the chance to see that I'm not a threat, and they are the ones in control. Once they start coming over to my hand to smell me, I start offering them bits of hay or veggies out of my hand. Once they're taking food from my hand, I start letting them out of the cage daily for at least 2 hours at a time (usually 2-3 times a day). Slowly, I start working on litterbox training, coming when called by name, going back into the cage when told, etc. When I'm dealing with a habitual nibbler, I will do two things. Every time I get nibbled, I screech loudly (this is what rabbits do when in extreme pain--usually causes them to freeze like a statue), and put them immediately back into their cage. They do not get to come out again for at least 2 hours. It can take a little bit of time, but usually works within one or two times.