Spaying does

Question
OK, we've got 2 lionhead bunnies, now probably about 4 1/2 months old.  We were told they were 2 females (sisters), but I was getting suspicious as one was growing noticeably larger than the other.  Now my fears are confirmed because the larger bunny has been mounting the smaller bunny.  I have now split them up (question 1 - is this psychologically damaging for them? - since they've been used to each other's company since birth?).  

I had always planned to get them spayed, but now I guess it'll be a spaying and neutering.  Question 2 - if I get it done this week and she's already pregnant - what happens?  
Question 3 - if the vet says they're still too young - do I continue to keep them separated and if I do - will I have problems reintroducing them once they've been fixed? (if they've been apart for a while)
Please help!  Many thanks
Rosamund

Answer
hello
They will not be damaged being separated. In fact most bunnies would rather be alone than with another.
Depending on your vet, she may not spay her until she has the babies, and if she does it will be like an abortion. If the vet says they are too young for spay/neuter then yes continue to keep the separtated, because you still can end up with babies. Being lionheads, they can become sexually mature as early as 3 months of age. So it is very well possible that the doe is already pregnant.  You should have no trouble reintroducing them, but if you are concerned, keep them in separate cages right beside each other where they can still see and smell each other, then they should be fine.
samantha