Bonding or introducing a new rabbit to your existing rabbit
The process of introducing two rabbits is known as bonding. As every rabbit is different and has its own personality, you cannot guarantee that two rabbits will bond. However, rabbits are gregarious and therefore predisposed to living together so the chances are good that the rabbits will get along.
The key things are as follows:-
1. The best pairing is male / female
2. Both rabbits must be neutered / spayed as soon as possible
3. Introductions must be taken slowly
It is much easier to introduce a female into a male's living space than vice versa. Females are by nature much more territorial and will therefore defend against a newcomer more vigorously.
If you have a hutch rabbit, you will need to borrow another hutch for a while and place the two hutches facing each other, so the rabbits are able to see and smell each other. Bear in mind that two rabbits need double the living space so you might need to invest in a new hutch anyway.
If you have a house rabbit, put the two rabbits in adjoining rooms with a baby gate or similar barrier between them or adjoining hutches. It is important that they are able to see and smell each other.
Give them a few days to settle down. The rabbits will be very curious about each other, touching noses through the bars and probably displaying some courtship behaviour such as honking and circling even though both are neutered / spayed. It helps to have a good understanding of rabbit body language. A good sign will be when both rabbits lie down either side of the bars as this shows they are relaxed together. It helps to feed them both together at the barrier so they get used to eating together.
If either rabbit has been recently neutered or spayed, you will need to wait 4 to 6 weeks for the hormones to reduce fully before attempting a face to face meeting. For two de-sexed rabbits, it can take anything from a couple of days to a few weeks - it all depends on the rabbits' personalities. If either rabbit is displaying aggressive behaviour such as growling and biting, wait a while longer before trying the introduction.
Meeting face to face
When they are ready, prepare a neutral space for the introduction i.e. somewhere that neither rabbit feels is "their" place then they are unlikely to be territorial about it. Remove anything that might hurt the rabbits if they run into it or jump on it but it is a good idea to provide a cardboard box with a hole in either end that a stressed rabbit can retreat into or jump on top of.
Put both rabbits in the prepared neutral space, crouch down at their level and remain there with them. The three most common scenarios are as follows:-
1. One or both rabbits immediately attack the other. This is very rare but is unmistakeable when it happens. For this reason it is advisable to wear thick gloves for the first meeting as you will need to intervene quickly to prevent the rabbits getting hurt. If this happens, seperate the rabbits immediately and go back to stage 1 i.e. seperate quarters.
2. In the most common scenario, one of the rabbits will take the lead and approach the other, sniffing and circling them and trying to mount them. This is not so much for courtship as for dominance and is the rabbits way of figuring out who is going to be "boss". A submissive rabbit will let this happen, putting their head on the ground, while a less submissive rabbit may nip or run away. Stay with the rabbits at all times and intervene if you feel one or both rabbits are becoming too stressed.
3. Love at first sight i.e. the rabbits approach each other as equals, sniffing and nuzzling each other but both are clearly enjoying the experience. This is rare so don't worry if it doesn't happen.
Assuming your rabbits follow the most likely scenario at point 2, allow them 10 minutes or so for the first meeting and watch closely for any serious aggression. Nipping and fur pulling is quite common and is not necessarily cause to seperate them. You can help by sitting down with the rabbits, stroking them and generally acting as a "chaperone" as they get to know each other. It also helps to have a water spray handy; spraying water in the face of an attacking or over-exuberant rabbit usually stops it in its tracks and furthermore encourages grooming, a social activity which fosters rabbit relationships.
Continue with daily meetings, increasing from 10 mins to 30 or 40 mins at a time. All being well, the rabbits will eventually stop taking notice of each other and become curious about their surroundings instead. This is the turning point when it is usually safe to let the rabbits roam free together in the house, however, continue to seperate them when you are not there to supervise. When the rabbits start to lie down together or groom each other, the bond is made and will continue to deepen with time. It is now safe to leave the rabbits together at all times.
Bonding problems and tips
Most problems arise because the rabbits are not de-sexed or the introductory period of seperate housing has not been for long enough. Rabbits that are introduced prematurely may have a fight and take a long time to recover from the trauma of it.
To help more difficult pairings or speed up the bonding process in general, you can try putting the rabbits into a situation which is stressful for them, such as a car ride - in theory the rabbits should turn to each other for comfort. You can also mimic bonded rabbit behaviour, such as grooming, by stroking one or both rabbits as they sit together as this should encourage them to lick each other.
In summary, slow and steady wins the race. Remain relaxed and calm or the rabbits will pick up on your nerves. Bonding rabbits is probably more stressful on us as observors as it is on the rabbits; ultimately they need to work it out in their own way - our role is to watch, encourage and make sure they stay safe.
****The above information is a guideline only, futher informaton will be available from your vet****