Honking
These happy little grunting sounds, called "honking," are like a love song. Often loudest and most prominent in intact males and females as they circle your feet or perform other amorous behaviors, but fixed bunnies also can make this cute noise to express affection or admiration.
Purring
Rabbits purr by quietly grinding their teeth or chewing air when they are being pet and are happy and content with life.
Loud teeth grinding
A rabbit that is lying on the ground with her arms and legs drawn in close to her body, making clearly audible chomping sounds is in severe pain and needs medical attention right away.
Screaming
A shrill, high-pitched scream that comes for an injured rabbit right before death. I've never heard this, nor do I ever want to!
Growling
This unmistakable sound is produced by rabbits right before they attack or bite. Could be at a human, another bunny, or another animal. Often accompanied by a double front paw lunge forward. Rabbits with attitude growl when defending themselves or their territory or when expressing general disdain toward a variety of situations.
Hissing
Also done right before an attack and in correlation with lunging. This rabbit is angry!
Thumping
Thumping or drumming with the hind legs means the rabbit is aware of some apparent danger and is trying to either warn it off or warn others. The sound of the thump and the resulting vibrations in the ground would be felt by other rabbits in the wild, who would perceive it as a warning sign. When this occurs at home, simply tell your rabbit "everything's okay," in a reassuring voice. Rabbits may also thump to express disapproval or disgruntlement.
Squeaking
I've heard multiple stories of rabbits squeaking, but I've yet to come across it myself.
Snoring
Some rabbits snore or moan in their sleep. These bunnies are usually on the portly side.
Snorting
Every now and then a rabbit will emit a surprisingly loud snort.
Hiccups
Yes, rabbits can hiccup! They make little hiccup-like noises and look as if they are spasming for a few minutes.
