Feeding Before and After Tortoise Hibernation

Stop feeding several weeks before hibernation so the gut empties completely, keep the tortoise warm during that fast so digestion finishes, and keep water available throughout.

Food left in the gut during hibernation rots. The tortoise cannot digest it at hibernation temperatures, and bacterial growth on the residue can kill the animal. This is the single reason the fast exists.

This page covers feeding only. It is not a general hibernation guide, and it does not tell you how to set up a hibernation box or what temperature to hold.

Who should not hibernate

Get this right first, because the rest of the page does not apply to a tortoise that should stay awake.

A tortoise that should not hibernate needs a full winter feeding routine instead. See winter feeding.

When to stop feeding, and why sources disagree

You will find UK veterinary advice recommending anything from two to six weeks. That spread confuses people, and it is worth explaining rather than picking a number and pretending it is settled.

Most of the disagreement is about what the countdown runs to. Some sources measure from the last feed to the start of cooling. Others measure from the last feed to the start of hibernation proper, which is itself two to three weeks later once gradual cooling is included. Both can describe the same actual practice.

The rest is about the animal. Gut transit time varies with body size and temperature. A large adult needs considerably longer than a small one, and a cooler tortoise digests more slowly.

The principle, rather than the number: the countdown is to an empty gut, not to a date on a calendar. Work backwards from your intended hibernation date, allow generously, and confirm by observation rather than arithmetic.

Keep the tortoise warm after the last feed. This is the step people skip. Withdrawing food and dropping the temperature at the same time means the remaining gut contents never get digested, which produces exactly the problem the fast is meant to prevent. Normal basking temperatures should continue through the first part of the fast.

Confirm before you proceed. The tortoise should be passing droppings during the fast and then stop. No droppings for a sustained period at the end of the fast is the signal you are waiting for, not the number of days elapsed.

Hydration through the fast

Dehydration, not starvation, is the main killer during hibernation.

• Water available at all times throughout the fast.
• Regular shallow warm baths, daily in the final couple of weeks. Lukewarm, shallow enough to stand in, fifteen to thirty minutes.
• Baths do two jobs at once: they encourage drinking, and the warmth stimulates the tortoise to pass what remains in the gut.
• The bladder should not be empty going in. It acts as a water reserve during hibernation. So the aim is a well-hydrated tortoise with an empty gut, not an animal that has voided everything.
• Bathing is also an inspection opportunity. Use it to check eyes, nose, mouth and general condition while you still have time to abandon the plan.

See water and hydration.

Feeding after hibernation

Waking is where feeding problems actually appear.

Drinking and urinating come before eating. A tortoise emerging from hibernation is carrying accumulated waste products and is dehydrated. Rehydration is the priority, and appetite usually follows it.

Offer familiar food first. Fresh greens and favourite weeds rather than anything heavy or unfamiliar. Flowers such as hibiscus and dandelion are useful for restarting interest.

Do not use fruit to tempt. Sugar is not the answer to a tortoise that will not eat, and for Mediterranean species it is a poor food at the best of times.

Expect some weight loss. Around ten percent of body weight over a hibernation period is within normal range. Substantially more warrants a vet.

Warning signs

Post-hibernation anorexia is a real condition rather than a tortoise being fussy. It can stem from low blood glucose or from an underlying infection, and it does not reliably resolve on its own. A tortoise that has not eaten a week after waking needs veterinary attention rather than more patience.

When to contact a reptile vet

• Before hibernating, if the animal has not had a recent health check
• During the fast, if droppings do not stop
• At waking, if the tortoise does not urinate
• Within a week of waking, if it has not started eating
• At any point, for discharge, swelling, weight loss or persistent lethargy

Find a reptile-experienced vet before you need one. A general small animal practice may not have the relevant experience, and post-hibernation problems tend to arrive with little warning.

See tortoise not eating for appetite loss more generally, and tortoise feeding guide for the wider routine.

Guidance here draws on the Royal Veterinary College hibernation guidelines, the British Chelonia Group, the Tortoise Trust and UK veterinary sources, checked as described in our sources and review policy. Where those sources give different timings, we have explained the range rather than picking one. This is husbandry information and not a substitute for veterinary care. See our veterinary disclaimer.

Last reviewed: September 2026.