You need to keep them separated and it will be a minimum of 4-5mo at least until you can try and bond them. Females generally cannot be spayed until 5-6mo, and both rabbits should be at least 1mo post-spay/neuter before they are ideal candidates for bonding.

Keeping them together runs the risk of pregnancy and also the “baby bond” phenomena, which is a temporary bond held together only by the fact that the rabbits are not yet hormonal. You cannot predict when one will become hormonal, so there are many unfortunate stories online where an owner wakes up and their two young rabbits are cuddling, then later in the day, there is suddenly a vicious fight with serious injuries. I’d recommend separation right away. Rabbits do not acknowledge family units, so them being siblings does not forgo the baby bond.

Whether they will be compatible after they are spayed/neutered is unknown, but you can always try bonding months from now when they’re ready and see how it goes!

We have a bonding section of the forum you can ask questions when you get to that stage, and there is bonding information in the RABBIT INFO section of this website!

It is the general belief that M-F bonds are the easiest, then F-F, and M-M are the most difficult. That doesn’t necessarily mean M-M bonds can’t work, and also doesn’t mean all M-F bonds work. It’s a lot to do with individual rabbit compatibility.

The typical route is to either adopt an already bonded pair of rabbits, or start with one and then speed date at rabbit rescues once your single rabbit is a viable bonding candidate to find a compatible partner to try.

M-F pairs do tend to be the most likely to bond statistically, and I’ve found this to be the case in my own experience as well. Even siblings will start fighting at puberty, so getting two same sex babies is not really recommended for easier bonding. Plus baby rabbits are very often mis-sexed so you can easily end up with accidental litters (females can get pregnant at 12 weeks). So, I agree with Wick that adopting a pair of babies is the most complicated due to the long time you would need to keep them separated while waiting for them to be castrated, healed, and then hormones settled.

Are there any rescues or shelters in your area? The simplest would be finding buns that are already spayed/neutered, so adopting from a rescue would solve that problem. , or better yet an already bonded pair. But, if you do need to spay/neuter it makes sense to get one bun first, handle their spay or neuter, then look into a second bun. Most male-female pairs do work out, it can just take more work to bond them with some pairings.