Welcome Aboard, Tommo,
Once those hormones kick in, it's hard to stop them from such acts until they are fixed.
Spaying is much harder on the wallet than neutering. I have anexcellent deal here in my area because a neutering costs $62, includingan overnight stay because they just like to be extra cautious. Spaying,not all vets do, and it can range anywhere from $150 and up from whatI've learned. Some people have been able to find ways to cut corners onthat price, you might ask a member of our board here named Buck Jonesbecause I know he has some suggestions - or perhaps someone else will.
Nine times out of ten, once they are fixed, that action dissipates, andthen stops after the hormones even out after the operation. You shouldwait at least 4-5 months though. Some vets don't like to do it before 6months.
Not only does getting them fixed usually stop that, it's also beenresearched that it decreases the chance of uterine and testicularcancer later on in the rabbits life. Uterine cancer can hit as early as3 years old. Of course, not every rabbit will get it, but the risk iscertainly higher if the rabbits aren't fixed.
-Carolyn