I love it! Trios are so much fun and it can be hysterical to watch them play together. And yes, 3 cages is in fact a nightmare! We actually got our buns when two of them weren’t neutered and spayed and the last boy came neutered. The boys I bonded together (but they didn’t live together — just had very good bonding sessions) and then the neutered boy and unspayed female I put together for bonding sessions. My un-neutered male and unspayed female we let “get to know each other” enough to see how they worked together.
Anyways, so basically… this may be long but I’ll give you the WHOLE story since I think it may be easier to understand that way. First we got our boy (unaltered) bun when he was 2 months — then along came a doe from the same litter (also unaltered) when they turned 3 months. We actually put them together in the same crate on the car ride back home since stressing out a bunny is actually one of the best things you can do for buns. When they feel terror together they will come together for comfort and the safety. The girl was completely terrified and took a lot of comfort in our boy bun the whole way home. When we first brought them home — we put him away and let her hang out around and just run around to get to know the play area and her cage and such. Then the next day we let them out together for about 15 minutes and kept a VERY close eye on them. (Dangerous, I know. But being amateur bunny owners we didn’t think much of it — some people think at such a young age it’s okay and some people don’t — our breeder we got them from told us they would fine together.) I’m guessing your buns might not be that young though? I would personally give them all stuffed animals or blankets/towels in their cages so their scent gets all over and then every day switch the blanket into another cage. Doesn’t SEEM like it would do much but it makes you see each buns personality to the scent of the “intruder” and really, if it bothers them it gives them a chance to take that aggression out on the stuffed animal or towel rather than the other bunny. The reason that can be very helpful is because sometimes the buns just get that first impression type of aggressive urge but then after that will be fine.
Anyway, when they all became 4 months — we got ANOTHER male from the litter and this boy bun was already altered but had only been altered for 4 days so I imagine his hormones were actually still there. The best way to go about the bonding process is to start slowly with maybe 5 minutes one day and every day up the number of minutes by another 5. If the buns, like mine, get closer quicker than expected than you can up the time more quickly. Each day I would spend the bonding time with each pair. Boy/boy, boy/girl, boy/girl. Each bond needs to be strong before you can put all 3 together. A very helpful tip that I learned quickly was to DEFINITELY put them in a neutral area. An area that none of the buns have been. If you don’t have access to a car ride on the way home — you can try tricks such as putting the first bonding session in the bathtub! It really freaks the buns out which can seem bad but the absolute BEST way to bond bunnies is putting them through stressful situations together. You could see what happens when you do that and how they get along. If they come together as a team or fight back at each other. And you can plan accordingly for the next session.
One of the most important things about bonding is to ALWAYS end on a good note. ALWAYS. Even if you have to force the bunnies to be happy by letting them sit on each side of you and get treats but make sure they ALWAYS do. Bad interactions with each other can stay in their minds forever and make it impossible to ever successfully bond them together.
After they all started bonding together in each pairs (which funnily enough my girl was harder to bond with the boys than the boys to each other) but then I just threw all 3 of them in together to see what they’d do! They had a few minor dominance battles (which I didn’t interfere in because they NEED to sort these hierarchy battles out before they can live peacefully together). After a few days of doing this they did really well together so we let them spend the night in their new condo (aka. neutral territory which personally I think helped a little also). They did REALLY well and we spent the night out in the living room just to ensure there was no fighting.
If you have any questions or concerns (I think I covered a lot but may have missed something) just let me know and I’d be happy to tell you what I know/have experienced!