My only concern would be how strong incense can be as it not only releases an intense smell but also smoke into the air. Rabbits are so sensitive to respiratory changes and problems that I wouldn’t take the risk, even if your rabbits seem okay with candles and other scents. I’m also biased because incense tickles my nose and makes my allergies kick in so I can only imagine a rabbit’s nose would be much more susceptible to the smell.

I agree with pink. I would not use incense. I actually love incense but have not used it or even scented candles in any part of the house since having bunnies. Along with the smell, I think the smoke would be upsetting to them, if not harmful.