Recognizing that a Flemish Giant is approaching the end of its life requires careful observation and an honest assessment of the rabbit's daily experience. The signs of terminal decline may develop gradually over weeks or months, or they may appear more suddenly in response to an acute illness or organ failure. Common indicators include a persistent and worsening refusal to eat, significant and unexplained weight loss, labored breathing, complete withdrawal from social interaction, and an inability to maintain basic grooming or hygiene.
A rabbit that has stopped eating hay and pellets for more than twelve to twenty-four hours is in a serious situation regardless of age, but in a senior Flemish Giant with known health issues, prolonged appetite loss may indicate that the body is shutting down. Similarly, a rabbit that no longer responds to favorite treats, no longer greets its owner, or sits hunched in one spot with half-closed eyes is communicating profound discomfort or exhaustion. These signals should not be ignored or rationalized away.
It is important to distinguish between a treatable condition and an irreversible decline. A rabbit that suddenly stops eating may have a dental abscess that, once treated, restores full quality of life. A rabbit with chronic kidney failure that has progressively lost weight despite treatment is on a different trajectory. Your veterinarian can help you understand the nature of the rabbit's condition, the prognosis, and whether further treatment is likely to improve or merely prolong the situation.
Trust your knowledge of your own rabbit. You have observed this animal daily for years and know its normal behavior, personality, and rhythms better than anyone. When the rabbit you know has fundamentally changed in ways that cannot be reversed, and when the changes are causing suffering rather than merely inconvenience, you are seeing the signs that the end of life is approaching.