Socializing old bunnies to new bunnies

Question
My wife and were planning on adopting a baby but when that fell through we decided to add two baby bunnies to our house instead. We already own two fully-grown rabbits whom we adore. However, the grown rabbits have become really agitated since the little bunnies moved in. They chase each other around the cage, sometimes pulling out clumps of hair (they haven't done this in over a year or so when they were first adjusting to us), and would chase the little babies around if we let them. We keep the new and old rabbits in separate cages and don't let them out at the same time. How can we help the old rabbits adjust to the new rabbits most quickly so no one gets bitten or worse? How long do you expect it to take before the new rabbits are accepted into the family?

Answer
Hi Marc

I need to know a few more things.  What are the sexes of the grown up rabbits?  Are they both spayed/neutered?  

If they are unspayed doe's and were living in harmony until the babies came along I can see where their might be a problem.  If they are spayed/neutered of either sex the only problem I see is that someone else has invaded their territory.  The aggressor of the fights may feel as though its bonded mate may leave him/her for one of the new bunnies.  It is so difficult to bond 4 rabbits.  It can be done but it takes a lot of work.

Honestly I would wait until after the babies get their spay/neuter surgery.  Often times after the surgery the bonds are broken and you have to start all over.  If there is an area where you can keep the babies separate until they are old enough for the surgery it may be better.  I would definitely keep them close enough where the older buns can still see them.  This will tell them that they aren't going anywhere no matter how much foot stomping they do.  If you really can't wait then you must introduce them in a neutral territory.  One that the older rabbits have never been to.  Like a garage or even the backseat of a car.  Basically since they have lived in your house they pretty much think they own it.  Any other animal moving in will be a major violation of their territory.  There is nothing wrong with a little supervised playtime in a neutral area.  Just make sure you are armed with a water spray bottle and be ready to jump at any sign of a fight.

Good luck with your new friends.

Pam