Rabbits are rehomed for many reasons, these include a child getting board with caring for the rabbit, a change in circumstances (such as a new baby) or a problem with the rabbits behaviour.
If you are considering rehoming a rabbit because of behaviour problems you may first like to consider some ways to deal with behaviour so rehoming becomes unnecesary.
If you are rehoming a rabbit with a behaviour problem, remember to give details to the rescue centre or new owner.
Between 4-6 months rabbits become 'teenagers', their hormones kick in which can turn your previously sweet little cuddle bun into a fluffy tailed monster. Spraying urine, forgetting litter training, false pregnacy and aggression can all follow.
Neutering your bunny has several positive effects, preventing unwanted litters and unterine cancer as well as removing the hormones that are behind many behaviour problems.
You should bare in mind that neutering won't have an immediate effect, it will take several weeks for the hormones to go and your bunny may still need to unlearn some problem behaviours.
Your vet should also be able to give you advice on dealing with bahaviour problems. UK Companion Rabbits has a rabbit vet list which may be of help if you are looking for a vet.