Bonding can sometimes be a very easy process, or a very long, complex and patience-demanding one.
Rabbits are individuals, and so some just won't bond together.
As I've heard, female-female bonds are the hardest to do, followed by male-male, and then male-female, which are the easiest.
The grooming is a good sign- what else are they doing? Curious nose-touching? Snuggling?
When they fought, did they circle one another? Make noises? How vicious was the fight? Any humping? Nipping as one runs past the other?
I would keep trying to bond them. Introduce them in a neutral area, (smallish), and be at the ready with thick gloves and something like a dustpan and brush to separate them (you don't want to be bitten during a rabbit scuffle- I can tell you from experience, and the lovely thick scar down my arm). If they are fighting (properly trying to bite eachother), then if you get in the way, they wont be able to distinguish you from the other bunny, and you may end up getting accidentally bitten!
Use your logic after a few weeks of bonding- how often are they fighting? Does it outweight the good times together? Are the fights getting less vicious and less frequent, or more?
I would visit some of the bonding pages in the Library, and read through some bonding threads- the are so many here, with many great tips.
Jen
