That may be a rare case of 2 bunnies that cannot be bonded. Even though Fenris is neutered, he is still acting like a breeding buck. Especially if its been months and he’s still doing this.

Hmm… perhaps they need a break. Like a complete break, where they cannot see each other for a little while. Then try again, starting with the basics. In the meantime, you should probably have your boy checked out. Since he’s neutered and 5 years old, there are things that can cause excessive humping. Bladder stones and adrenal problems come to mind.

I agree that a long break is needed, sorry you are having such a stressful time of it.

I think ideally they would be completely separate, but if that’s not possible, just try to minimize their interaction. If you don’t plan to try to re-bond them any time soon, you might just figure out what your permanent double single bunny set-up would be and go with that.

I’m wondering if they were ever bonded completely, since if I interpret your post correctly, they were only together for a week or so before the biting started? it’s possible the transition from neutral to non-neutral was too rapid. It also sounds like you had a pretty tough time bonding them. Once bonded, did they groom each other? Did they seem pretty happy together? Or just kind of a mutual tolerance?

I had a pair where one was very nervous and afraid of the other bun. I thought they were bonded, because they stopped trying to fight and would relax near each other. But then 5 months later a fight broke out, and I think they had reached a sort of truce, but didn’t really trust each other.

I do wonder about a medical cause, like LBJ10 suggested. I might have both buns checked out. Sometimes when one bun falls ill it upsets the bond. Was your girl injured?

If you do attempt to re-bond, I would take a different approach, and focus on building trust and positive association between them.

And, as others have said, they may just be one of those rare couples that aren’t a good match. Or maybe after a long break and a lot more pre-bonding they will be fine. There are members here who have stories of buns that were deemed unbondable, so they ended up having them live side by side as neighbors. Then years later, they find one bun has escaped to the other side, but the two are cuddling and suddenly bonded.

Yes, ideally, there would be no contact… so separate rooms. Sometimes when there is “bad blood” between two rabbits, it helps to give them a break from each other and allow them time to sort of forget. If you can’t do that, then I agree with what Dana suggested. After they have had a break, then you would proceed with the bonding process from the beginning. You can do pre-bonding things for awhile, getting them used to each other’s presence again. Then you can move on to bonding sessions in neutral territory. There is still a chance they can bond, you just have to take things slow and not rush.

Sometimes an illness can cause problems between a bonded pair… so hopefully the ear infection is all it was. I had to ask about the other possibilities because cases of “older” neutered males exhibiting sexual behaviors due to adrenal problems is pretty well documented. Bladder stones are a less common cause, but it is something we have seen on the forum before.

Did you try allowing him to hump for a few seconds and then moving him over to a surrogate?