Rabbits can experience sadness or depression for various reasons, and understanding their body language is key. Here are signs to watch out for:

- Frequent Pacing: Anxiety or boredom may lead to pacing. Provide new toys, enhance their living space, or consider a rabbit companion.
- Excessive Hiding: While hiding is natural, excessive hiding, especially in social rabbits, might indicate illness or fear. Pay attention to changes in hiding behavior.
- Destructive Behavior: Increased destructiveness could signal unhappiness, boredom, or separation anxiety. Ensure they receive attention and stimulation.
- Thumping: Thumping can indicate danger or protest. Differentiate between annoyance and genuine concern based on the situation.
- Anti-Social Behavior: Unwillingness to interact for an extended period may signal sickness, fear, or unhappiness. Changes in the environment or separation from a companion could be factors.
- Feet Flicking: A brief flick of the feet expresses annoyance, often following activities like nail clipping or brushing. This usually passes quickly.
- Biting: Biting cage bars, water bowls, or people might be a sign of sadness, trauma, or feeling threatened. Identify the source and address accordingly.
- Pinned Ears: Flattened ears against the body can indicate stress, anxiety, or sickness. Comfort your rabbit and observe their behavior.
- Shaking: Shaking or heavy breathing may signal fear. Comfort your rabbit through cuddles, soothing words, and a safe environment.
- Lunging: If your rabbit lunges, it could be a response to feeling threatened or upset. Approach them at ground level, and avoid introducing them to potential threats.
Bonus Indicator: Smaller-Sized Poop: Depressed rabbits may eat and drink less, resulting in smaller, drier droppings. Monitor changes in their stool consistency.
Remember to differentiate between signs of unhappiness and potential illnesses.