Tortoise hibernation is a naturally evolved survival strategy that in captive animals requires careful management to prevent the welfare harms of abnormal weight loss, dehydration, and premature emergence.
Tortoise hibernation welfare requires understanding of the physiological processes involved and careful management of the conditions that determine whether hibernation is safe or harmful. Natural hibernation is not simply sleep - it is a profound metabolic state in which body temperature, heart rate, and organ function are dramatically reduced. The welfare harms of poorly managed hibernation include: premature arousal in warm spells that burns fat reserves before spring food is available, dehydration from insufficient moisture in the hibernation substrate, excessive weight loss from inappropriately high temperatures causing metabolic activity, and frostbite from temperatures below freezing. Pre-hibernation health assessment is essential: only tortoises that are fully healthy and at appropriate weight relative to shell length should be hibernated. Underweight, ill, or parasitised tortoises that are hibernated may not survive. Post-hibernation care is equally important: tortoises that emerge in spring are typically dehydrated and require immediate warm soaking to encourage drinking and reactivation of the digestive system. The owner skill and knowledge required for successful tortoise hibernation management is significant, explaining why tortoise welfare problems from hibernation are common in inexperienced keeper households.