Mr Roger was pretty sensitive to loud “no”s, claps, etc.
My current trio are largely unphased. We block off areas, cover things up and contain them when we can’t supervise them.
We’ve currently got a serious cage rattling problem. Charlie has worked out how to lift up the panels of the pen to about 10cm high and then repeatedly drops them onto our hard floor. I’m thinking of getting foam pieces to muffle the sound so the poor people downstairs don’t have to suffer. We’ve also got some carpet chewing where we dropped some condensed milk once.
These problems have got to the point where we’re spraying water at them. We’ve put it off until now, because it seems mean. It is working, though. (Make sure the spray bottle hasn’t been used for chemicals.)
We’re only using the spray for those two problems, not any of their other shenanigans. Too many things and the rabbit won’t be able to associate the behaviour with the response. For cage banging, we’re combining with putting small amounts of fresh hay into their cage (fresh from the bag is much more enticing than stuff that’s been sitting around, lol).
We’re also not intending to use the spray for things that may be confusing for the rabbit – for example, if you give your rabbit paper/a cardboard box and then they chew your paper, it will send a mixed message.
Best of luck.