Please note the topic of intentional breeding is prohibited on this forum and so do not make further mention of it.
I understand not wanting to “change him” to suit your needs, and you also acknowledge that how he is literally right now is likely stressful and frustrating for him. Pet rabbits are a result of human domestication, so we have already taken many liberties and he has already been changed to suit your needs as a result. My personal opinion (with no negative judgment to you as it is a valid choice) is that by owning a pet rabbit, there is an understanding and acceptance of something “unnatural” and neutering a male who appears stressed/frustrated by innate urges that are incompatible with the lifestyle we enforce on human pets (we don’t want our pets humping and spraying is 24/7) seems like a wise decision. For me, it is the same as opting for an incisor extraction for a snout-faced breed whose teeth aren’t compatible with their head shape or spaying female rabbits because their elongated lives as domesticated animals have revealed their high risk for uterine cancer.
I’ll also add that cute bounce and young energy is going to go away regardless just due to age. Rabbits tend to mellow out, as LBJ mentions, not only in hormonal behaviors (we expect), but also in general as well. Just some things to think about. It’s OK if you opt not to (again, no negative judgment), but I think it’s not right to associate changing him as being a bad thing.– change can be good too.
Agreed to start out with presenting a stuffed animal/similar object with supervision to see how it goes before allowing it outside supervision, if required.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.