It sounds like it’s going well. I would not introduce Oreo to Vienna’s space, until they’re on pretty friendly terms – as this may cause her to become very aggressive towards him. You may want to let him roam her space, perhaps while she’s in another room, or his space… but be prepared for her to thump and potentially mark her territory once she smells his scent in her area.

Good luck – but it sounds like you’re off to a wonderful start.

As Baxter n Boo said I would not put Oreo in Vienna’s space at this time. Are they both spayed/neutered?

Are you able to house them in the same area so they can see/smell/hear each other (far enough a part so they can’t fight). Something I did when I bonded my bunnies was switch them around in their living spaces so they would get used to the other bunnies smell. If that’s not realistic you can also switch around their litter boxes for the same purpose. 

Some good advice can also be found HERE

I’m not an expert by any means. My bonded pair were easy so I’m sure other members here will have a lot more advice.

There may not be any grooming – grooming is not necessary to live together, so don’t try to force grooming. It’s more important that they trust each other and are relaxed around each other than grooming one another.

Don’t worry about grooming right now. Like Sarita said, grooming is not necessary for bunnies to be bonded. One sided grooming is fine too. It is really rare to have bunnies grooming within the first couple days.
How big is the space you have them in? Make sure to start out small and work into bigger spaces. Start in a bathtub maybe. Also make sure you start in totally neutral territory. Some bonders will start in semi-neutral territory and unless its love at first sight for both buns, you always start totally neutral.

I agree with the others. Totally neutral territory is going to be needed since Vienna is territorial aggressive.

Do you have a bathtub? It’s the what I’ve heard of people using as neutral territory the most often because bunnies are really never in there.

I don’t think a bunny could scratch a bathtub but I understand having to abide by your mom’s rules. Would she change her mind if you put down some towels or something? The bathtub is not necessary it’s just generally the easiest solution to neutral space. I wouldn’t use either bunnies territory if they’re fighting for bonding at this point. Hm… Can you use any other space in your house? Even just a room they’re not commonly in or anything? Oh! What about in laundry basket? Then they couldn’t scratch anything and it’s portable.

Just popping in on this post — I wouldn’t be putting either of them in anyones territory until you’ve cemented a bond elsewhere. Instead of looking for areas, look for things that the buns aren’t use too. When bonding my trio into a quartet we did a lot of bonding in a big box and then some stress bonding in a laundry basket. When beginning bonding, you need to have ways to end these fights quickly before anyone can get bad feelings. A small easily accessible area such as a box or laundry basket can make shaking the box stop a fight quickly because it will stress them both out. If they keep fighting, then drag the box around and bang on the sides, lots of noises to make them nervous. The concept is they will get nervous and go back on their instincts to fight the threat together rather than as one bunny.