Wick used to snore when he slept whenever he was sleeping while cuddling with me. I don’t think he does it when he’s alone, but then again my ear isn’t right up against him. His snoring has lessened now, but there is only once instance I can recall where he was snoring in his hutch while I was falling asleep, so a snoring rabbit is possible. Also very cute.
If her breathing sounds normal (not wheezy) both while active and when resting, it’s likely she may just be more vocal at night time during peak-rabbit-activity hours. It could also be snoring.
This is a recording of Wick snoring/grunting when being cuddled with: http://vocaroo.com/i/s0zErnNzqWOc
— Notably, this was when Wick was sick with his upper respiratory infection, so his nose was clogged (hence the sneezing at the end of the recording). The clogged nasal passages probably contributed a lot to Wick being “vocal” for the first few months.
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.