I totally get this anxiety, I’m dealing with this with my current pair (but they are more newly bonded so I’m still on high alert all the time). Bun Jovi is being a frisky grandpa (he’s 11!) and starts honking and chasing Myra a few times a day. I wonder if it’s spring craze?
Since this is a new-ish thing for your two, I wonder whether there might be an underlying health problem with one bun? I had another pair where one bun had dental pain, so he would groom the other bun less when his teeth hurt, which would lead to some squabbling.
If there isn’t a health problem, I think it’s best to let things play out. But you could try some bonding sessions with them in a neutral space or some stressing to see it that helps. I also can see how the hutch environment might make one bun feel cornered cause some squabbles. Can you attach an x-pen to their hutch to give them a bit more space at night to sort things out with room to move? Even adding some tunnels or other obstacles can help break up chasing.
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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.