What is a common behavior in rabbits that indicates they are comfortable?

Chinning objects is a common behavior in rabbits that indicates they are comfortable and feel secure in their environment. Rabbits have scent glands located under their chins, and when they rub their chin on objects, they are marking their territory with their scent. This self-marking behavior signifies that the rabbit feels safe enough to claim items in its surroundings, showing a level of comfort and confidence. It reflects a relaxed state and social well-being, as rabbits use this action to communicate with themselves and other rabbits.

In contrast, barking is not a behavior exhibited by rabbits; it is characteristic of dogs. Thumping their hind legs can be a sign of alarm or warning in rabbits, indicating anxiety or discomfort. Refusing to eat is generally a sign of stress or illness, which is the opposite of comfort. Therefore, chinning is the definitive behavior that indicates a rabbit is at ease.